Akai and Kanie from Kite use their status as homicide detectives to lead the investigation of a series of professional murders away from the true criminals. They are also the employers of the true criminals. And that's not all they're mixed up in either. Akai in particular when it's revealed that he's been raping and brainwashing Sawa, one of the child assassins he and Kanie employ.
It's quite plausible that the Triad leader Mr. Chang in was one of these as a cop. Chang is a darker take on several John Woo characters, but his past as a cop seems to allude to Tequila from Hard Boiled. Since Tequila fought gangsters and Chang is one, it stands to reason that he wasn't that honest of a cop.
Chief Watsup, the Chief of Police in Roanapur. Not only on the take from the various cartels that run the city but has also used his authority to get an unfair advantage when collecting bounties put out by the cartels.
Ginza of Speed Grapher is mostly a Rabid Cop, given her habit of "self-defensing" people (she actually uses it as a verb), but she's kind of a dirty cop as well. She's shown essentially committing insider trading based on the crimes going on, and because of her jealousy of Kagura, she abuses her authority to obstruct Saiga, the hero. By the end of the series, she has a Heel Realization and ends up a better person.
Mad Bull 34 is a bizarre example - as part of the Buddy Cop Show dynamic, Officer "Sleepy" John Estes takes the Cowboy Cop's tendency see justice done through venues outside the law to the extreme. He's running prostitution in his neighborhood, because the way he sees it that stuff will always be there and at least if he's in charge he can keep it from getting out of hand and it keeps the girls safe. That said, it's all part of a larger Batman Gambit. He's also really good at killing criminals. You won't want to watch him work, but you can't imagine what the city would be like without him.
The title characters of Noir kill a few of these over the course of the series.
In the Naruto pilot, the Inspector and his subordinate turn out to be one, killing Takashi, stealing the painting and framing Naruto for both.
Monster has two of these: the two detectives who are hired by Johan to kill Nina's adopted parents and the ones from Prague, Commissioner Hamrlik, Chief Detective Batella and, Detective Janacek.
In one episode of Nerima Daikon Brothers, Gagdet Detective Yukika tries to catch the eponymous group by cooking up a rumor that the chief of police is in league with the yakuza, and the money from their dirty deals is in a vault under the station, knowing they'll fall right into her trap. However, when the NDB tunnel in, they find that the chief of police actually is in league with the yakuza, much to Yukika's surprise.
In the Crapsack World of Gangsta crooked cops like Chad and Cody are honestly some of the most goodhearted people around. Yeah, they hire mercenaries to slaughter local trouble makers for the placation of powerful Mafia families, but at least they're doing so to keep the peace and prevent widespread slaughter. Less noble policemen are noted to except bribes and clean-up unwanted corpses.
The entire Gotham City police department is corrupt, with the exception of Gordon and one or two good cops. This becomes a major plot point in Gotham Central, a series set within the Major Crimes Unit of the Gotham City Police Department, the only consistently honest branch of the department. Since its members are all personally selected by the commissioner they have a modicum of integrity and competence, but the universal corruption of the rest of their force makes even their simplest of cases difficult since the other departments are stealing evidence, accepting bribes, and often committing the crimes themselves. This comes to a head in the Corrigan story arcs, where Jim Corrigan (The dirty cop of the series) is selling crime scene evidence on the black market, redistributing the heroin that is collected by the narcotics department, and eventually starts personally murdering other police officers that are trying to stop him. At the end of the series, though everybody knows he did it, his web of corruption has spread so far that the case against him is sabotaged and he gets off completely free until Final Crisis Aftermath where it comes back to bite him in the ass. The one time Internal Affairs and the MCU are actually able to build a case against him, they have to compromise their morals and let him go to save one of their own.
Even the MCU isn't immune. Harvey Bullock may have been more of a Cowboy Cop most of the time, but everyone agrees he went too far when he gave one of his Mafia connections information on a man in witness protection so they would kill him. The man in question shot Commissioner Gordon, but still. In his pre-Crisis origin, Bullock WAS a dirty cop, on orders from the mayor to sabotage Gordon's career, but then came to respect him.
Blüdhaven was even worse than Gotham. Criminals there who didn't share the profits from their crimes with the police were murdered. The police chief placed a bounty on Nightwing's head. The only truly honest cop - technically - in Bludhaven was Nightwing himself, who in his Dick Grayson identity, joined the force in order to bring it down. (The city was eventually destroyed when the Secret Society of Super-Villains dumped the monstrous Chemo into the place; Nightwing, Robin, and Batgirl survived because they were lucky enough to be out of town at the time, but pretty much every other resident wasn't so lucky, and the fates of other Blüdhaven-based heroes such as Tarantula are unknown.)
Elsewhere in the DC Universe, Hub City (where The Question is the biggest heroic presence, if you can even call him one) is even worse than both of those. The FBI yearly analysis lists Hub City's police department as the most corrupt department in the country, and even the honest cops currently trying to improve the department have bad history; the current straight-arrow chief only became a crusader for integrity because of what he encountered when he was out shaking down local criminals and businesses for the bribes they owed him.
In the Astro City "Dark Ages" story arc, Charles' partner Lannie takes weekly bribes from the criminals to overlook their activities. Charles refuses to get involved, rejecting the bribes but refusing to report Lannie to Internal Affairs. He gets shot in the back as a result.
The Brotherhood in X-Men Noir, Chief Magnus' private task force dedicated to controlling the criminal element from within. Magnus is dedicated to the pursuit of justice, but as he says, "laws only work on the law abiding."
Luke Cage Noir, meanwhile, has Officer Rachman and Tombstone, corrupt cops working for Randall Banticoff. Tombstone in particular was a gangster before (and after) he became a cop.
The Archies encounter one in "Trap City, U.S.A."; while driving through a small town, their van is pulled over by the sheriff for speeding- They weren't, but the sheriff works on commissions, so pulls everyone over for a fine. He's also the judge, so fighting the violation in court's no good. The Archies are forced to do a concert to pay the fine, but manage to get back at the sheriff when Veronica spots her uncle, the state governor in the audience, and tricks the sheriff into making a Engineered Public Confession while Uncle George is listening. The story ends with the ex-sheriff hitchhiking out of town, at which the Archies offer him a lift- for a fee of $12 a mile.
Harry took a rather cynical view of law enforcement in general in Harry Potter and the Mind:
"There are two general kinds of person who become policemen, or aurors. One group is made up of starry-eyed young people who see opportunities, and want to change the world into a better place. Another group is made up of those who want an easy government job, and like to be able to bully and boss people around, ignore red lights, and steal an apple whenever they like.
"After the young idealists are on the force for a few years, they find out that they cannot change the world after all. So they become embittered and hardened to suffering, or leave the force. So who does that leave waking the beat? The bully. The bully is not your friend."
Officer Macendale from Ultimate Spider Woman is on the take from some powerful crime syndicates. However, he doesn't look the other way from crimes against mutants, because in his mind, they are as bad as he is, since they justify hate with talk of protecting humanity.
The Departed: Colin Sullivan is Frank Costello's mole in the Boston police department.
The Cherry Hill PD, hoo boy. They even respond to a call about a shooting (phoned in by Kumar so he can sneak into the police department and break out Harold), and arrest the nearest black man they can find, who was asleep in his home.
This turns out to be Shooting themselves in the foot when the guy turns out to be a high priced lawyer who, after being on the receiving end of overwhelming evidence of police brutality is able to have all the cops arrested.
Denzel Washington's character Alonzo Harris in Training Day. He frames and beats up suspects, has ties with criminals, kills people he doesn't like, betrays his friends for money, and uses his badge to intimidate everyone in the gang-run neighborhood he frequents.
Hank in Me, Myself & Irene is an subversion. While he's certainly a Jerkass he's not corrupt, and represents Charlie's repressed anger at the abuse he's taken over the years. It's Charlie finally accepting this aspect of his hidden personality that enables him to take down the real dirty FBI agents who are setting him up at the end.
In Back to the Future, Doc is interrupted by a cop while rigging his lightning rod. The cop asks to see a permit for his "weather experiment." Notice that Doc reaches into his wallet to look for the permit. The deleted scene then shows that the "permit" is actually a Mr. Ulysses Grant.
Rooster in Righteous Kill after it is revealed that he killed all the people and had Turk framed for it.
In the movie The Fugitive, Frederick Sykes is an ex-cop and contract killer who happens to have one arm. It is also loosely implied that Kimble was framed by the Chicago Police Department in order to protect Sykes.
In the movie Shooter, a local cop tries to kill Bob Lee Swagger as part of the frame-up.
Every cop who is a main character in L.A. Confidential. No one is completely clean, not even the usually upstanding Ed Exley:
Jack Vincennes takes bribes from Sid Hudgens to bust famous suspects for Hush-Hush, though he seems to take a Heel-Face Turn when Sid tries to set up a blackmail scheme by arranging a sexual encounter between the district attorney and an actor that Jack previously busted.
Wendell "Bud" White beats up criminals on Capt. Dudley Smith's orders and kills the ones whom he truly despises during arrest while staging 'self-defense'. He also is a Wife-Basher Basher.
Dick Stensland is a drunken thug who beats up unarmed prisoners on the basis of escalating rumors that they hurt some cops and deals in heroin on the side.
The worst is Captain Dudley Smith, who has taken over Mickey Cohen's empire and staged the Nite Owl Massacre himself.
Most of the cops from Batman Begins (with the exception of Gordon). Flass is the most notable one, to the point of such pettiness as pocketing money from street vendors because he doesn't want to cough up a few dollars for some fast food.
In The Dark Knight, Gordon notes to Dent that if he chose not to work with cops Dent investigated in Internal Affairs, he'd be working alone. Ramirez and Wuertz are on the mob's payroll and delivered Rachel Dawes and Harvey Dent to the Joker. It's implied that Ramirez had some moral issues with what she did to Rachel Dawes and the Commissioner's family but we never find out about Wuertz. In some of the promotional animated materials that bridge the timeline of the two films, Ramirez is shown to have a VERY sick mother that the mob is using to force her to be a dirty cop (offering much needed money for her bills and threatening her life if Ramirez doesn't cooperate).
Completely averted by The Dark Knight Rises, where police corruption is nonexistent and the force is definitely much more competent, especially when they all rally together for a final fight against Bane's army.
Any cop in Batman (except Commissioner Gordon), especially Lt. Eckhardt (an Expy of Bullock, more or less) who is hired by Grissom to kill Jack Napier.
Every policeman in Hobo With a Shotgun: "At least he's only killing the dirty cops." "We're ALL dirty cops!!"
A gang of corrupt detectives make life difficult for both drug lord Frank Lucas (Denzel Washington) by demanding money, invading his mom's house and destroying her furniture, shooting his dog and assaulting his wife, and honest cop Richie Roberts (Russell Crowe) by almost taking $10,000 in bait money and outright telling him not to arrest Frank to keep the drug/bribe business going. They're only stopped when Frank and Richie team up to catch all the corrupt cops that Frank knows, nearly 3/4 of the police force.
In addition to the detectives, Richie's career is ruined when he and his partner don't keep a million dollars, making the other corrupt cops in his squad suspicious that they'll turn them in. This drives his partner to stealing and drug use, culminating in a fatal overdose on Frank's "product."
A group of dirty cops in Assault on Precinct 13 (2005) with very superior firepower attack a lonely police station in order to silence the gangster who could expose them. However, they're staggeringly incompetent, carry their badges during the assault, and use police vehicles, leaving one to wonder how they expected to get away with it.
The Negotiator: Lt. Danny Roman is accused of murdering a cop (his former partner and best friend) and suspects he's been framed by his fellow officers in a conspiracy. Commander Frost eventually confesses about a scheme to steal money from the police retirement fund, which Roman inadvertently got dragged into when his friend got killed for starting to catch on.
Melbourne Detective: I'll tell you how this game works Daniel. We're the cops, we get to ask the questions. You're the suspect, you get to complain about your civil liberties, perhaps get shot, maybe even killed. And it has to stay like that Daniel, otherwise everything falls out of balance. When things fall out of balance, you know what happens then don't you Daniel. Your spiritual values start to decline. You get your disintegration of your social structure, don't you? The system collapses. Petulance, flood, famine. It happened to the Romans, it happened to the Greeks, it happened to the Ancient Mesopotamians. And we don't want it happening to us do we Daniel?
The customs official in The Dogs of War putting aside half the protagonist's belongings as "Airport Tax" and "Importation Tax".
Keaton in is the leader of the group of criminal protagonist, and as described by the Hero Antagonist cops was one of these. He had ties to organized crime and murdered several people.
The villain protagonists conduct a heist that involves robbing corrupt NYPD cops and the cartels which are paying them.
Kujan tries to portray himself as a good cop in contrast to Keaton, but he's all too willing to say that, if Verbal doesn't tell him the whole story, he'll call in every favor he has in the underworld to have Verbal killed.
Commander Forrester wants to seize power by building an army of psychic 'scanners' to keep everyone else in line. He uses the psychics for brainwashing and assassination to position himself into increasingly higher public offices. He kills the chief of police, compels the mayor to appoint him as his replacement and kills her as well when she finds out too much.
Forrester's lackey Officer Gelson enthusiastically participates in his boss's plans to exploit the scanners and take over society.
The Corrupt Hick police officer in The Final lets the jocks go in exchange for them handing over all of their weed... which he is later seen smoking. In a deleted scene, we see that he does the exact same thing with good-looking women, in exchange for sex.
Played with in Fallen, where early on Hobbes explains to a new transfer that while he doesn't take bribes, he doesn't really care all that much if other cops do, since he figures they are still putting their lives on the line and out there doing good 90% of the time anyways. For a dash of irony, the transferee was played by the future Tony Soprano.
A ring of dirty cops want to kill a witness in 16 Blocks.
Barricade from the live action Transformers movie is a Decepticon that can turn into a police car.
Changeling has Captain J.J. Jones, who is willing to go any length to protect the image of the LAPD, including giving Christine a stand-in for her missing child, forcing her to care for him, and committing her to a mental institution when she finally decides to stand up for herself.
Payback features two dirty cops. These two cops are, besides the Internal Affairs officers in one scene, the only cops in the whole movie.
"Dirty cops. Do they come any other way?"
Dirty Cops are a fact of life in The Elite Squad. Nascimento muses that the police have enough manpower to clean up the city, but it's a lot easier and safer to take bribes and look the other way... unless you're a member of BOPE. The sequel adds a "militia" of corrupt cops who take over pacified slums (all is Truth in Television, see below).
In Arnold Schwarzenegger's End of Days, it appears the entire NYPD are secretly Satanists. And not the fun, pot-smoking free-love Satanists either, but the "murder witnesses and abduct women" kind.
Detective Kaota in Outrage works for Yakuza and is the one coming out on top of the affair.
Hot Fuzz has the never-seen Uncle Derrick, who was arrested for selling drugs to students. Ironically, he inspired his nephew Nick Angel to become a genuinely good cop. One of the film's main villains, Frank Butterman, is also this. Though in his case, he's more of a Well-Intentioned Extremist.
Some of the earlier scenes featured an officer who keeps troubling the main characters (a group of children who are forced to steal to survive). It eventually turns out he takes bribes to ignore the actions of specific criminals while still prosecuting others. However, this is much less prominent in the later parts of the film when the children have grown up into vicious gangsters.
There's also Danny Aiello's Chief Aiello, who's paid by a steel company to break a strike.
Officers Warren and Norton in Bride of Chucky. They collaborate to plant a bag of marijuana on Jesse just because he's dating Warren's niece, Jade.
In The Jerky Boys: The Movie, the two title characters find out that the entire Queens organized crime division is in league with a local crime boss, making it difficult to turn over evidence on said crime boss to the authorities.
Anthony Quinn's character in Across 110th Street, who hides this by masquerading as a Cowboy Cop.
The Mexico City police in Man on Fire is full of them. The kidnappers outright hire off-duty cops to assist in Pita's kidnapping.
This trope is the main focus of Dark Blue, and provides several examples.
Eldon Perry frames people for crimes, shoots suspects, and behaves like an all-around Jerkass. Later on he becomes repentant of his actions and atones with a speech that uncovers all of his and Van Meter's shady dealings.
Perry's supervisor Jack Van Meter is one through and through, and oversees and orders all of Perry’s corrupt actions. He's even revealed to be the person Orchard and Sidwell answer to.
Bobby Keough subverts it when he has serious moral qualms with the illegalities committed in the department.
Towards the end of Wild Things, Ray Duquette is revealed as one of these. He was corrupt, beat hookers, murdered anyone he didn't like, and got Suzie sent to prison just for the hell of it.
Major plot point of Cellular as it's revealed several Homicide Detectives are in on a corruption ring.
The boisterous protagonist Rick Santoro of Snake Eyes is an arrogant, corrupt detective who sees Atlantic City as his own Wretched Hive. He takes bribes, doesn't hesitate to use Police Brutality, and sleeps around on his wife. The conspirators even get him involved because they knew he could be bought if he found out too much. He draws the line at plain murder, though.
NYPD Detective Jimmy Shaker in Ransom is the mastermind behind the kidnapping of Tom's son and planned to kill Sean all along.
In Hellraiser: Inferno, Detective Joseph Thorne cheats on his wife with prostitutes, neglects his family, brutalizes his informant, steals evidence, does drugs, frames his partner...
Detective Mark Hoffman of the Saw franchise who is also an apprentice of Jigsaw and the most ruthless antagonist of the series.
In The Thieves, Wei Hong has several cops on his payroll. One reveals his presence by betraying his colleagues at a vital point during the climax.
Non-Stop: One of Marks' fellow Air Marshals is found to be smuggling cocaine. This was used by the terrorists to blackmail him into making Marks think he is the one trying to hijack the plane. It's also hiding a bomb.
Noburo Mori from The Wolverine. A minister of justice with ties to the Yakuza.
Jake Gittes in Chinatown strongly implies that Mulvihill was one during his time with the police. In their first scene together, Gittes mentions that when Mulvihill served (during Prohibition) "the rumrunners never lost a drop," hinting that he was on the take.
It's probably fair to say that the majority of James Ellroy's characters are either dirty cops (or feds) or former dirty cops. Dudley Smith from L.A. Confidential is just the one most people know. Edmund Exley was also far more compromised in the book than the film. Although the books (where Dudley Smith is around until the end of White Jazz does subvert this a bit by having Exley make the bringing down of Dudley Smith his first priority as Chief of Detectives (although this is more because of personal dislike than anything professional). By the end of White Jazz, Exley is compromised, essentially having become the counter-Smith within the department. The entirety of the action is the protagonist being caught in the power struggle between the criminal empire Smith has built and Exley's own quasi-criminal means to achieving his ambitions. Eventually, Exley drops his hatred for Smith in favor of his political ambition and the protagonist ends the book, decades later, deciding to return to LA to bring both men's sins to the light. The protagonist, Klein, is himself quite the Dirty Cop, but the ultimate point is that his sins pale in comparison to either of theirs.
Blore, one of the villain protagonists of And Then There Were None is a former cop, whose crime is fitting up an innocent man, leading to his victim being sentenced to hard labor and dying in prison. Blore is presented as devious and amoral, suggesting this was indicative of his general behavior as a police officer.
Once he comes into power in the system, Vimes comes down heavily on major abuses such as corruption, but lets smaller offenses slide as a sort of Necessarily Evil. He absolutely won't condone Police Brutality, though (although he might fake it if need be). Even then, Vimes is fully willing to go Cowboy Cop and ignore the law when necessary, since he views justice as "protecting the innocent" rather than "obeying the law".
Sergeant Colon is a rather good-natured version, mostly in exchange for food. In The Fifth Elephant, he gives a local restaurateur immunity from parking fines in front of his building in exchange for one of his famous lunches (and some information.)
Between Night Watch and Men at Arms, the Day Watch under "Mayonnaise" Quirke was just another city gang. The Night Watch weren't even competent enough for that.
The City Watch Diary 1999 has a transcript of a speech by Vimes which gives his definition of a Dirty Cop, and why Colon is on the right side of the line:
I know all the little tricks, all the cafés that’ll feed a copper for free, the places to stand out of the wind, the cushy jobs, the pubs where the uniform will get you a buckshee pint; I know the grease on which this city runs and I know the difference. I also know dishonesty when I see it and if I find you taking bribes your feet will touch the ground because I will cut you off at the knees, believe me.
In the first book of The Echo Case Files series, the local police department is corrupt from top to bottom. Those cops not taking backhanders from organised crime are involved with a terrorist group.
Subverted with Officer Shrift from The Phantom Tollbooth. Sure, he arrests people for no reason and throws them in jail, but he does it as a joke. Unless they really do something bad, they can leave any time they want.
Margin Play: Some members of the Seattle Police Department are bent and are being paid off by the cabal of bad guys. Amber doesn't know how many or which ones, so she doesn't dare go to the police about the beating she received for investigating the real-estate scam.
In the Provost's Dog trilogy of the Tortall Universe, the city guard/police force has a much looser definition of "dirty" than the modern one. They have an established protocol for collecting bribes ("happy bags") from local businesses and will collect personal bribes frequently, but you're only supposed to do it for minor crimes rather than things like murder. Police Brutality is also acceptable (although it's supposed to be limited to the times that you're really sure it will help your inquiries) and Cage Dogs engage in Cold-Blooded Torture during interrogations.
In Illuminatus!, most cops are not angels and will accept at least minor inducements to look the other way. Chicago copper Otto Waterhouse accepts a ten-dollar bribe, discreetly wrapped around a sample of the product, to allow the Eris Tomato Juice Company to carry on giving out free samples without a licence, immediately outside the convention of a Religious Right Moral Guardian group. When he throws the empty cardboard cup away, the ten-note is gone. But the effects of the mind-altering drug he has just taken will linger on...
One of the people after James Bond's head in Nobody Lives for Ever is an older corrupted German policeman Heinrich "Der Haken" Osten, who is rumoured to have been involved with the Nazis back in the forties.
Several members of the Behaim Circle in Pact fill this role with a supernatural twist-even though they Cannot Tell a Lie, they manipulate other officers against fellow wizards, relying upon the Masquerade to prevent their victims from pulling anything drastic and countering any subtler attempts.
In A Song of Ice and Fire Janos Slynt is this, although the fact that he's taking bribes is less noticeable than that he's starting selling promotions.
Most of the police force in Devils Cape are corrupt. Dustin Bilbray is openly racist, and takes bribes. There's also Warren Sims, although he isn't corrupt by choice.
Walker, Texas Ranger: Several episodes had corrupt cops, mainly in background roles, but one — the Season 4 episode "The Brotherhood" — was the focus of an episode. A small-town police department is run by a police chief frustrated about the crime rate and the perception that criminals get off on technicalities, so they kill the suspects after they are freed by the court. At one point, the crooked officers turn things up another notch when they throw a lighted cocktail into a prison bus, killing several prisoners and the guards and badly burning the driver. The main focus of the episode was on a Marine Corps recruit named Ernesto Lopez, who had been accused of rape only for DNA evidence to exonerate him; Walker is unable to get to Ernesto before the overzealous cops do, and Walker is left to track down the two stooges. The chief eventually turns his gun on himself when he learns Walker is coming for him.
Adam-12: Several episodes dealt with corrupt fellow officers of Reed and Malloy, the most notable of the lot being the 1971 episode "Internal Affairs – Blackmail," where one of Malloy's best friends is being investigated for blackmailing a witness.
The Dukes of Hazzard: Sheriff Roscoe P. Coltrane, who invariably looks the other way as Boss Hogg engages in corrupt scheme after corrupt scheme, and then attempts to pin the blame on Bo and Luke Duke.
Boss Hogg is Roscoe's brother-in-law and the one who appointed him sheriff, probably because he knew he could keep Roscoe under his thumb.
In the first season, it was explained that Roscoe lost his pension in the county bond election and does Boss Hogg's bidding because he needs the extra money. That plot point was dropped later on.
B.J. and the Bear and Sheriff Lobo: The title character of the latter series, who in the former show tried to put truck driver B.J. McCay out of business by pinning various crimes on him. In his own series, Lobo always tried to manipulate various schemes to his advantage.
A Noodle Incident in "Mr. Monk Gets Fired": we learn that the new commissioner has a personal vendetta against Monk ever since a cop friend of his was put in jail
The Detective Mole type in "Mr. Monk and the Captain's Marriage": the killer is a police officer securing the scene, who is implied to be working for a known racketeer
In "Mr. Monk Is On The Run," Parts 1 and 2, the one-time Sheriff John Rollins is this. He works for Dale "The Whale" Biederbeck.
The Expanded Universe novel Mr. Monk and the Dirty Cop likes this trope, as there are three: First is Paul Braddock, a former SFPD detective Monk, Natalie and Stottlemeyer encounter at a convention. Monk and Natalie later learn from Stottlemeyer that Braddock had a long history of physically beating up people, to the point that Stottlemeyer threatened to turn him over to Internal Affairs. Unsurprisingly, when Braddock turns up dead, Stottlemeyer gets blamed for it and is wrongly arrested, since they had an altercation hours before the murder at a wake (making Stottlemeyer the second "dirty" cop). The third is Nick Slade, Braddock's real killer, who turns out to have taken out a hit on an entrepreneur years beforehand.
At least two on JAG; Royal Ulster Constabulary Inspector Vincent Hutchinson in "Trinity" who arranged the kidnapping of the infant child of an American naval officer and an IRA member, only to put the blame entirely on the IRA; and DC Detective Frank Coster in "The Stalker", who did not only stalk Mac, but killed her former boyfriend Dalton Lowne and kidnapped her.
They've also been seen on NCIS, although usually as a one-off. In a flashback we find out that Tony left the Baltimore police department when he found out that his partner was dirty.
NCIS: Los Angeles: There is a group of dirty cops who act as an escort service for drug dealers and other criminals. Turns out they drew the line at helping terrorists
Firefly has the downright brutal Lieutenant Womack, who is a member of Allied Enforcement but who likes to smuggle human organs on the side.
Andromeda: In "Lava and Rockets" Molly Noguchi and Dylan are stunned to learn that the police will accept a bribe in public. The reason is low taxes and a high crime rate.
The Strike Team on The Shield can be seen as the poster boys for this trope, with the added twist of half the team (Curtis Lemansky and Ronnie Gardock) being good cops who fell in with the wrong crowd and largely stayed in the shallow part of the corruption pool, and Vic Mackey and Shane Vendrell, who killed fellow police officers in order to cover their own asses when they were in danger of being exposed. They also sell drugs they get from buy-busts, use torture to interrogate suspects and protect drug dealers they can control, all in the name of "keeping the peace".
Being a bad guy on Damages seems to entitle you to at least one (and usually more than one) corrupt cop/FBI agent on your payroll who is willing to surveil, harass, or murder anyone who bugs you too much.
They usually don't actually show up, but the existence of these is sometimes part of the reason why the clients on Burn Notice can't just call the cops. In "Unpaid Debts" they ran afoul of a group of them, and in "Question and Answer" Sam pretended to be one.
Life On Mars has a number of episodes which revolve around Gene Hunt and his superiors' relationships with local gangsters or corruption in general. Ashes to Ashes Series 2 was a complete arc about the fight between Hunt and various corrupt Met officers such as Mac, which doesn't end with Mac's death part way through the series.
And finally, Patterson, Commander Khokar, Commander Penney and Lia Honey are all involved in some way with Counterpoint. Making Gabriel about the only clean cop in the series.
Criminal Minds has a cop who has a hero homicide complex, he sets ups a shooting so he can make himself a hero by being the first to respond. He attacked Garcia fearing that she could find out about his murders.
Weeds has a number of dirty cops and Nancy even ends up married to a dirty DEA agent.
Justified has Doyle Bennett who IS a corrupt cop, but only in matters concerning his family.
Season 1 featured a corrupt sheriff who worked for a Miami drug cartel. He struck a deal with them so he could get revenge on a child killer. He is actually a fairly effective sheriff since he is able to crack down on illegal drug manufacture and sales in the county. The drug cartel is not interested in selling drugs in the county and helped him get rid of the local meth manufacturers who were their competition in other areas. Things go bad for him when the cartel asks him to help them kill Raylan.
Season 3 had an election for sheriff where both candidates were in the pockets of criminals. The incumbent hardly hesitates before accepting a Briefcase Full of Money from Quarles. When Boyd Crowder realizes that the sheriff works for Quarles he recruits his own candidate to run for the position. Subverted in the end because Boyd's candidate pays back Boyd by warning him about an arrest warrant and then states that their deal is done and he is not doing more favours for Boyd.
Season 4 had the Marshals searching for Drew Thompson, a fugitive from the FBI and the Detroit Mob who 30 years before faked his death. Raylan quickly discovers that the FBI agents assigned to the case are working for the Detroit Mob and as a result the US Marshal Office gets full jurisdiction on the case. The local sheriff is tentatively in Boyd Crowder's pocket but he is reluctant to help Boyd in the search for Drew and tries to show Raylan that he is not actually corrupt. The sheriff turns out to actually be Drew Thompson.
Season 5 features Smug Snake sheriff Noone who has been the corrupt deputy for most of the other corrupt sheriffs and police chiefs on the show. He is finally promoted to acting sheriff and goes after Boyd on behalf of the Clover Hillers, a group of Corrupt Hicks. Boyd then forces him to turn against his employers and has him murdered.
Against The Wall plays with this trope a lot. It is based around a protagonist in the Internal Affairs division always investigating cops or other law enforcement officials. Sometimes played straight, sometimes subverted.
The Arson Unit, of which Kellerman is the only cop NOT on the take. Kellerman spends almost the entirety of Season 5 bitching about how he's not dirty and then at the end of the season he goes and shoots Luther Mahoney, unjustifiably. And then he coerces his partners into covering it up.
There's also at least two other storylines involving Police Brutality and murder of suspects by police.
It even implied that one of its main detectives might be dirty. Fontana wore very nice clothes and flashed a big roll far too often for a simple detective.
Back when he was "on the sauce", Briscoe was implied to be dirty (or at least surrounded by a lot of other dirty cops). By the time he joins the 27th Precinct, he only pretends to be a dirty cop in order to get his informants to trust him.
CSI NY has done this repeatedly. Flack's mentor, Mac's first partner, Danny's old partner...
Brass was originally an aversion of this, stating how he refused to be a dirty cop. But now, he is flirting with subverting it, ever since he covered up Ray Langston's unjustified killing of Nate Haskell by pocketing Ray's flex cuff at the scene.
In the penultimate episode "Vegas" of Stargate Atlantis, Detective John Sheppard barely manages to keep his job by scraping by on his quarterly performance reviews, has illegal gambling debts and quits the force to skip town after stealing money from a crime scene. Rodney McKay is extremely disappointed in him, since met another version of him that was honest and determined and a member of the Earth's defense against alien threats. He turns around before it is too late, and dies stopping the villain.
Leverage has surprisingly few for a show about Robin Hood like thieves. Virtually all of the targets are Corrupt Corporate Executives with a dirty cop not appearing at all until well into the second season. Hardison also impersonates a dirty cop during "The Boys Night Out Job" convincing Mexican drug dealers that he can help them.
Dyson and Hale from Lost Girl are a twist on this concept, as they are not so much corrupt as they have different loyalties than they should as police officers: they're big on the whole "protect and serve" thing, but their main job is to cover up Fae (psrticularly Light Fae) involvement in human crimes. There's a second level to this as well, as Dyson is actually more loyal to Trick (the former Blood King, but in practice nothing more than the owner of a Fae way point) than he is to the Ash, the leader of the Light Fae, and both he and Hale are more than willing to turning a blind eye to Bo breaking Fae law ( as much as Fae law actually applies to Bo in the first place). Hale is also willing to ignore Kenzi's occasional brushes with human law(as well as spring her when she's incorrectly suspected of a crime), although he does stop short of actually helping her to receive stolen property.
Fusco starts as a dirty cop working for the first Person of Interest. Reese gets just enough blackmail to force Fusco to work for him as a Friend on the Force, where he provides information and surveillance. Despite his growing desire to be a good cop, Reese has him play a dirty cop to infiltrate HR, a powerful group of NYPD corrupt cops.
HR is an extremely corrupt group of NYPD cops who provide protection to the organized crime outfits running crime in the city. They have no problem acting as killers-for-hire and will kill other NYPD police officers who get in their way. They have prosecutors and judges on the payroll and at one point help a bunch of young Russian gangsters join the police force so they have loyal foot soldiers for the future.
One POI was on the run from her abusing husband, a corrupt US Marshall who used his authority to track her down when she left him.
1-800-Missing takes this trope to its logical extreme in one episode: the entire department being investigated is corrupt.
Sheriff Graham from Once Upon a Time has a good heart, and ultimately is a good cop most of the time, but he's completely under Regina's thumb and will plant or tamper with evidence for her.
Copper is set in 1864 New York and is full of Dirty Cops, including the hero and his friends. The police force of the time were notoriously corrupt and for the most part acted as just another street gang. When the detectives foil a bank robbery, there is a definite pecking order as to who gets to steal what from the crime scene. The informant gets to grab a few coins, the detectives get to stuff their pockets with some bank notes, the sergeant gets a pocket watch belonging to one of the dead robbers and the captain gets to deliver the remaining money back to the bank and decide how much he will keep as payment for the 'protection' his cops provided.
Hustle would sometimes feature Dirrty Cops who thought they could manipulate the crew for their own ends. This always ended badly for them. D.I. Fisk in "Curiosity Caught the Kat" is a typical example.
In the Season Six finale of Psych, it turns out that all of Henry's old friends from the force were paid for guarding a drug lab back in the day.
The White Bulls of Witchblade are a whole organization of these.
Chief Wayne Unser from Sons of Anarchy is a sympathetic version of this. He helps out the local criminal motorcycle club and in return they provide protection for his trucking business. Unlike most examples of this trope, however, he does it because he believes the Sons are better for the town of Charming than the other gangs who would take their place if they were to disappear.
The Rizzoli & Isles episode "What Doesn't Kill You" revolves around for the hunt for dirty cops in the Boston Police Department. Suspicion falls heavily on Jane for a time. The chief dirty cop turns out to be the head of Internal Affairs.
Grimm Captain Renard who secretly has connections with the Wesen world, and is secretly Wesen himself. This is due to him being a member of a secret royal family of Wesens who control the Wesen world, but Renard is a white sheep among them, as he is secretly working in a resistance against them.
Dexter's Quinn is a former dirty cop trying to clean up his act. He does succumb to temptation at one crime scene — and is spotted by Dexter, setting off a growing enmity between them. Eventually, his past comes back to haunt him in a big way when he's blackmailed several times by a criminal group he used to take money from.
Sgt. Trevor Gibson in the Midsomer Murders episode "Sleeper Under the Hill". He is involved in the murders and does his best to throw Barnaby and Jones off the trail. He ultimately falls victim to his partner in crime.
Del: Now listen here, Slater, I know a lot of coppers and they're all good blokes. I mean, I don't like 'em, but they play a fair game. And then there's you...
Averted in an episode of Father Ted where Ted goes off on a rant about the good old days when the police would cover the Church for any wrongdoing.
Crops up so often in Starsky & Hutch that it sometimes seems like the titular characters spend just as much time fighting off their fellow cops as they do civilian criminals. In fact, it sometimes take quite a while for a crook to realize that they're not being coy when they insist that they can't be bought, which doesn't cast a very good light on the BCPD.
One is feeding information to the Big Bad in episode 1x06 of By Any Means. Helen takes a particular pleasure in arresting him.
Sgt. Voight of Chicago PD supposedly is. But it's also been indicated that he's heavily involved with Internal Affairs and may simply be pretending.
Detective Harry Denby of NYPD Blue is investigating Det. Kirkendall's ex-husband for involvment in drug running. He later turns out to be working with the criminals he is supposed to be investigating. After he is suspended from the police department and waiting for indictment he tries to take over the whole operation for himself.
In The Hour, it turns out Commander Stern was the one who actually beat up Kiki, and one of many authority figures to be Blackmailed by Cilenti into doing his dirty business.
The Juárez police in The Bridge. It's such a way of life there that all Marco can muster up is frustration when someone he knows moonlights for a cartel.
Since this is Gotham, practically everyone is a Corrupt Cop, including the Captain of Homicide Squad, since they all are under Falcone's payroll. Crispus Allen and Renee Montoya are relatively straight but bend the rules and are fairly Jerk Ass and condescending to the people around them. Bullock is too cynical to care anymore. Jim Gordon is the only cop who is decent and wants to destroy the corruption of the police and the city from within.
It tends to be forgotten now that the Monty Python sketch about London gangsters The Pirhana Brothers was intended to be biting satire on the way the Krays and the Richardsons got away with it for so long. The two family crime syndicates in London were busted not so much by police action as by investigative reporting forcing the Met to do something. Not only the incompetence but the corruption of the Metropolitan Police was mercilessly exposed.
So why didn't you go to the police?
I would have done. Except for the fact the bloke holding the tactical nuclear device was the Chief Constable for our area!
The second verse of Lupe Fiasco's "Handcuffs" is sung by a drug dealer, commenting on his arresting officer, making such remarks as "You ain't no better than me, just a hustla with a badge."
Phil Ochs' song "Here's to to State of Mississippi" decipts the cops in Mississipi that way:
They're chewing their tobacco as they lock the prison door Their bellies bounce inside them as they knock you to the floor No they don't like taking prisoners in their private little war Behind their broken badges there are murderers and more
The NWA song Fuck Tha Police has quite a few of these
Chamillionaire's hit song "Ridin' Dirty" was about racial profiling with particular regards to cops pulling over black drivers and hassling them (known as Driving While Black). This is a common theme in hip-hop and rap songs.
When you start off as a nobody in Pizza Tycoon, the police are pretty much straight edge. Once you have learned some street smarts and have some respect in the community, you'll be able to pay your way out of trouble and into the police's favors.
Edi E. from Final Fight took bribes from the Mad Gear Gang, controlled a part of the city, and got the crap beaten out of him by the heroes. He later double crosses the Mad Gear Gang by arresting it's members during the events of Final Fight Revenge.
Samuel L. Jackson's character Officer Frank Tenpenny in Grand Theft Auto: San Andreas uses his position to get rich off the drug trade and keep all the gangs in Los Santos under his thumb and on his payroll. He threatens to hurt Carl's loved ones to force him to eliminate a case pending against him and his colleagues for his corruption. He murders two of his partners for growing a conscience and trying to expose him. When the case against him is dropped due to lack of evidence and witnesses (which he destroyed or killed throughout the game), the outrage causes a city-wide riot. Unusually, he claims to be a Well-Intentioned Extremist trading in small crimes to prevent larger ones, but the events of the game don't bear it out.
B.B. from the first game turns out to be one of these, especially when it's learned that he killed Alex at the Roscoe Street Station and had Max framed for it.
Winterson in the sequel, who has a love affair with the Big Bad.
The entire UFE in part 3, being essentially the private army of the Big Bad and working with outlawed paramilitaries to abduct and organ-harvest the poor. Ironically, despite Rodrigo dismissing him as another of these, Da Silva is the only one we see onscreen who isn't.
Sumaru City's police force seems to have a bit of a problem with these, to put it mildly. One of them is a boss battle in Eternal Punishment.
The Godfather: The Game doesn't just have beat cops, but also FBI agents on the take who will help you keep the other families under control if the vendetta escalates to open Mob War. In fact, if you want to pull off a decent caper in the game, you'd better pay off the cops beforehand so they'll look the other way.
The Hitman series has several antagonists who are corrupt members of law enforcement.
Codename 47 has the Hong Kong Chief of Police.
Contracts has the last target, Albert Fournier.
In Absolution, pretty much the entire sheriff's department of Hope, South Dakota, including the sheriff, Clive Skurky, is on the take from Blake Dexter. Also, in some of the Chicago levels, police officers work for the bad guys in some capacity.
Batman: Arkham Origins: Pretty much the whole Gotham City Police Department is on the take somehow, with the rest being too afraid to stand up. Especially prominent in Commissioner Loeb and Branden.
In the first Resident Evil there's a rather unusual example: Albert Wesker was the team captain of Division A of the S.T.A.R.S. Precinct and presumably also their leader, and seems outwardly to be a model cop. However, he is in fact a double agent for the Umbrella Corporation, and more importantly is intending to lure the S.T.A.R.S. Teams to their deaths at the hands of B.O.W's both to silence them and to give the B.O.W's battle data, and later games reveal that he was in fact also planning to betray Umbrella as well.
Resident Evil 2 has Police Chief Brian Irons, a wife-beater and multiple rapist who is on Umbrella's payroll and thus not only works to conceal their wrong-doings, but is also implied to discredit potential competitors and provide human test-subjects for them. He's also a lunatic who suffers a mental breakdown during the resultant Zombie Apocalypse, actively sabotages the efforts of his police to aid the human survivors, and finally takes to hunting them down and killing them himself. On top of all of that, the game also drops heavy hints that he may be a Serial Killer as well. And by hints we mean the human skulls in his secret taxidermy chamber. Made worse in Outbreak. One of the files in the first scenario notes that 8 blonde women, all ages 18-23, started disappearing and people were saying there were groans and screams in the sewers. The description matches his last victim in RE2, the Mayor's daughter.
Agent Ross from Red Dead Redemption, who's hobbies include kidnapping people's families in order to force them to track down outlaws he should be tracking.
C-Sec officer Harkin, although he is fired from the force by the second game. Anderson mentions that the only reason he lasted as long as he did because humanity wanted a presence in C-Sec and it would look bad if he was busted for one of his numerous crimes. By the sequel, there are enough humans working in C-Sec that it was no longer a concern, so he was sacked.
Captain Bailey is a deconstruction of this trope with a sympathetic POV. He's willing to take bribes from The Mafia... but only because it helps keep the peace and keeps his men alive. He authorizes rough interrogation of prisoners... but only because the crime rate in his district is awful and he feels the need to use extra force. He's also on Shepard's side for the most part and will bend the rules for him/her when he needs to.
Officer Kaira Sterling from the Noveria corporate police is openly taking bribes to cover up Administrator Anoleis' corruption, and is more than willing to murder anyone who gets in the way.
Kaira: Do you know what we did to cop killers back on my world? Wrex: Do you know what we did to dirty cops back on mine?
L.A. Noire has the entire LAPD except for Cole Phelps and his partners. Except for his fourth partner, Roy Earle, on the Ad Vice desk.
Dead Rising has Jo Slade working as a mall security raping women and beating them with her nightstick.
Dead Rising 2 has Raymond Sullivan, who is working for Phenotrans all along.
Tashmann from the first Drakensang game: the first time you see him he's trying to use his badge to hire a prostitute for free.
In Devil Survivor, after a few days in Tokyo after a lockdown resulting from demon presence, a group of police officers begin abusing the power of demon-summoning objects called COMPs to rob and/or kill others. They eventually surrender their powers after being beaten twice, the second time when faced with the lord of death, Yama.
LAPD Detective Ben McCall is on the lighter end of the scale; he steals petty cash from criminals to help pay for the medical expenses of the child of one of the many hookers in his jurisdiction that he's protecting, he otherwise has a very strong sense of justice (although he also has anger issues and is prone to Cowboy Cop behavior as well as the Jack Bauer Interrogation Technique). By "street cop" standards he's practically a boy scout.
DEA Agent Eddie Guerra is on the much more extreme end of the scale; he's secretly running a network of street dealers to sell drugs for him, in order to pay off his huge gambling debts. He also sets up an informant to be murdered because he was worried Internal Affairs was getting to the guy. It also turns out he was The Mole and helped the Cartel abduct key witness Jessica Stone, because they owned his gambling debts.
FBI Agent Kim Evans is by all appearances an idealisitic Good Cop, but is (reluctantly) willing to commit crimes, obstruct the investigation, and outright murder witnesses when ordered to do so by the director of the FBI, supposedly for The Greater Good (although it turns out most of her crimes were the result of her being mislead by the director).
Commissioner Kinsler is shown in Halo3: ODST's data pads to be concerned with nothing but his own personal interest, even as the Covenant are invading New Mombasa. If you manage to collect 29 data pads, you'll find out that the cop whom you've been fighting alongside with is on Kinsler's payroll.
In Mortal Kombat, it would really be wrong to say that Stryker is any worse than the other characters who are supposed to be good guys (all of them are willing to use lethal force). Still, his Battle Cry in the 2011 game is "Police brutality comin' up!" (Also, in that game, Stryker is unique in that he is the only character who appears to kill his opponent upon winning a match even if he does not successfully perform a Fatality; he throws a grenade offscreen, which results in an explosion, followed by a scream from the loser and a lot of blood.)
Part of the backstory of Streets of Rage is that the police has been taken over by The Syndicate. This leads to the three protagonists, who are police officers, quitting to take on the syndicate by themselves. The one remaining uncorrupted cop provides them with occasional backup in the form of a bazooka and and a machinegun-equipped helicopter.
In Kirisawa's route of Metro PD: Close to You, the 2nd Unit's investigation into a drug ring becomes much more complicated when they come across indications that the Chief of the Detective Bureau is involved in the drug ring in some way. He is indeed dirty, and has been for a long time, including acting as a mole for the mafia back when he was serving under the command of Kirisawa's father.
An interesting aversion is Detective Tyrell Badd. He's a good man, a good cop, and the third 'leg' of the virtuous thief Yatagarasu.
Another interesting aversion is Dick Gumshoe... Although that might be because he's Too Dumb to Fool.
And then there's Damon Gant who is a dirty police chief, and was strongly implied to be forging evidence before he killed anyone. There's something seriously broken about the Ace Attorney legal system.
Apollo Justice introduces us to Daryan Crescend, who is an international affairs agent who smuggles cocoons into the country (for good reasons) and kills Interpol agents (not for good reasons).
Valerie Hawthorne from T&T, who helped fake a kidnapping and frame an innocent man, though she did try to make up for it.
Dual Destinies brings us a dirty bomb squad member in Ted Tonate, who sells the bombs he dismantles in the black market and offed a detective who caught him in the act.
Dual Destinies also gives us Bobby Fulbright, who seems at first to be one of the nicest and most morally good cops in the series. Except he was killed and replaced by the game's Big Bad, the Phantom, before the game even began.
In addition, Dual Destinies deals with the fallout of having so many corrupt members of law enforcement: the public has zero faith in the legal system, and as a result, the majority of the legal profession has no qualms about being dirty, as long as it gets a victory.
In the "Phoenix Rising" Story Arc from Sluggy Freelance, Officer Tod is actually a former mob enforcer. He's found a pretty sweet gig where, as long as he covers up the local Vigilante Woman's numerous murders, he can just sit back, do nothing, and collect a fat paycheck from the government.
In The Gamers Alliance, George Bush is a dirty officer in the Maar Sul's SAVAGE who accepts bribes and looks the other way when the Totenkopfs act and does his best to help the cult's evil cause whenever he can.
Gronkh's mini-Let's Play of the game "Die Polizei" (a police simulator) was about being a racist, sadist, foul-mouthed asshole, to emphasize the bad quality of the game and spice it up.
The royal guard is corrupt and abusive, although its officers try to keep things safe and reasonable.
Roger from American Dad! turns into a dirty cop when he joins the police force in one episode... about three hours after joining, no less.
Family Guy: Parapeligic officer Joe Swanson has outright looked the other way many times when his closest friends – Peter, Quagmire and Cleveland – break the law, even if not explicitly stated as such in the given episode. Instances include:
Numerous episodes: Quagmire's repeated preying on (and having sex with) teenaged girls and raping women (drugging many of them via GHB); and Peter for showing strong, if not outright blatant pedophiliac behavior.
Numerous episodes: Peter repeatedly abusing Lois – particularly in "The Courtship of Stewie's Father" – and Meg (countless episodes).
"Rude to Rupert": In addition to not only doing nothing to stop Peter, Quagmire and Cleveland from annoying Meg during her driving test, he joins in the "fun."
"Jerome is the New Black": Peter causing a fire at his new friend Jerome's house, this out of jealousy and hate when Peter believes that Jerome (a black man) is having an affair with Lois.
"Family Goy": From his upstairs window, Peter shoots a gun at his Jewish neighbor Mort Goldman while he is at his mailbox (a scene emulating an infamous scene in Schindler's List). Not only does Joe fail to arrest Peter, HE ALSO SHOOTS HIS GUN AT MORT (greeting him with a friendly hello to boot)!
"Burning Down the Bayit": Peter and Quagmire conspiring with Mort Goldman to burn down Goldman's pharmacy (to allow him to collect an insurance settlement). That last one was also a It's Personal moment when he remembers that his insurance company wouldn't pay for a surgery to allow him to walk.
The concept is parodied in the Codename: Kids Next Door episode "Operation: P.I.N.K.E.Y.E.", (the story being a lampoon of the old private eye genre) with Numbuh Two's old friend Joe Balooka. Technically Joe is just a grade school hall monitor, but the story depicts him like this, Numbuh Two describing him as "a bad cop and a worse friend", and as it turns out, he's taking bribes from the true villain in the episode.
The King of the Hill episode, "Lupe's Revenge", has a police woman who severely abuses her power. Naturally, in accordance with Hank's hilariously bad luck, she falls in love with him.
In Minoriteam the villainous Dirty Cop is a police officer made of dirt and grime who actively participates in the White Shadow's evil schemes and, like many of his cohorts, is virulently racist.
Chief Wiggum and the Springfield police in The Simpsons are sometimes shown to be corrupt as well as incompetent.
Wiggum's badge has "Cash Bribes Only" written on it. Which is odd, as "I Love Lisa" implies that he got the Krusty 20th anniversary special tickets as a result of a bribe when he (unintentionally) caught Krusty in a porno theater.
Lisa: That story isn't suitable for children. Wiggum: Really? I keep my pants on in this version.
An inverted example involving Wiggum, he has also been willing to break the law for a very honorable reason: To help Homer's fugitive mother escape arrest, as her crime caused his asthma to be cured when he was younger. He has done so twice.
From the theme song from Cops In Springfield: "Springfield cops are on the take/What do you expect for the money we make?/Whether in a car or on a horse/We don't mind using excessive force."
In the French cartoon Patrol 03, the series' Big Bad was the chief of police herself.
In the Donald Duck short Duck Pimples, a belligerent Officer O'Hara-type threatens Donald and accuses him of stealing a pearl necklace, then turns around and steals the bracelets off the Femme Fatale's arm. He also turns out to be the one who stole the woman's pearls.
The LAPD's Rampart scandal, involving widespread corruption on the part of CRASH (Community Resources Against Street Hoodlums), the unit that the LAPD put together to combat the street gang violence that was going on in Los Angeles at the time.
Louis Eppolito and Stephen Caracappa, detectives with the Organized Crime Homicide Unit of the NYPD's Major Case Squad who were also acting as both informants and assassins for the mob, murdering eight people on orders from the Lucchese crime family.
Richard "Dick" Cain, a Chicago vice cop, investigator for the U.S Attorney's office, and head of the Cook County Sheriff Department's Special Investigation Unit. He was also an enforcer and hitman for the Chicago Outfit and a personal friend of its boss, Sam Giancana. After being drummed out of law enforcement for perjury in the mid-'60s, he operated as a full-time gangster, became an FBI informant in order to undermine his mob rivals (much like Whitey Bulger would do years later), and was eventually assassinated when the Outfit bosses learned that he was plotting to kill them and take over.
One of the many shocking things that came out of investigation of organised crime in London in the 1960's was that so many cops and detectives were on the take from the Kray Brothers and the Richardsons. The Met was reorganised and reformed after this. However, the old mentality lives on: during more recent investigation into the scandal of illegal phone-tapping by sleazy newspapers, it emerged that many, many, British coppers were happy to accept "inducements" from News of The World and Sun reporters. The unhealthy relationship between policemen and sleazy hacks explains how quickly and unerringly embarrassing arrests involving celebrities get onto the front pages of the papers. Money goes one way and information goes the other.