Chief Wiggum: Hey, I crack cases all the time. Like the case of the symphony conductor who murdered his star cellist.Also known as the "Open Mystery"; a style of Crime and Punishment Series show popularized by Columbo. The traditional mystery challenges the viewer to solve the mystery along with the detective. Usually, the viewer is disadvantaged by the fact that the detective knows more than the viewer (We Would Have Told You, But...; Tomato Surprise). But in the Reverse Whodunnit, the advantage goes to the viewer: we actually get to see the murder as it is committed. The "mystery" for the viewer is not "whodunnit" but "howcatchum." We know who, what, where, when, and why, perhaps in more detail than the detective will ever know. For the viewer, the question is: how will the detective solve what appears to be a perfect crime? A successful Reverse Whodunnit requires a very intelligent criminal, capable of designing a crime complex enough that its solution remains interesting even if you already know who did it and why. It also requires a far cleverer detective than you can get away with in a standard Whodunnit, because the writers can not rely so much on misdirection to make his job look hard. For example, solving any Scooby-Doo mystery would be trivial if Velma let the audience get a good look at the clues instead of hiding them until The Summation. Sometimes called a "Police Procedural" (but not to be confused with the Police Procedural) because its focus is on the procedure rather than the solution. This was probably invented by R. Austin Freeman in 1912, in his collection of detective short stories The Singing Bone, which featured Dr. Thorndyke. He called this concept the 'inverted detective story'. A subtrope of Internal Reveal. Compare and Contrast both Clueless Mystery and Fair Play Who Dunnit
Lou: That was an episode of Columbo, chief. They show you who the bad guy is at the beginning of each one.
Wiggum: Yeah, but you have to remember!
Lou: That was an episode of Columbo, chief. They show you who the bad guy is at the beginning of each one.
Wiggum: Yeah, but you have to remember!
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Anime & Manga
- In Death Note, the main character is secretly an infamous mass murderer and the series follows his attempts to avoid suspicion from police and a few genius detectives.
- The long running anime Detective Conan does these occasionally to mix things up. Although showing the audience the crime itself is rare, often there's only one likely suspect from Conan's point of view, and he has to figure out how they set up a false alibi.
- Monster. In this instance, the hero himself knows who the killer is for almost the entire series, it's just finding and capturing him that's the problem.
- In the Ace Attorney manga's first case, the killer is shown in silhouette in the prologue section after the murder.
- MW has Meguro having guessed right that Michio Yuki is the Serial Kidnapper.
- Les Diaboliques. Alfred Fichet is investigating (on his own time) Michel's disapperance, who was killed by his wife and mistress. Alfred Fichet is the inspiration for Columbo, too.
- The Alfred Hitchcock films Dial M for Murder and Rope.
- Fracture: "I killed my wife...Prove it."
- Memento plays the hell out of this trope. We see who (supposedly) was the murderer and so does Lenny in the very first scene. However, the film goes in reverse, and then with him only remembering scenes in several minute intervals, as we see the outcome and learn the clues as he does while already being "spoiled" to the ending, because of it going in reverse. For the first half, the viewer is able to string together the various short bits of color and he is not, involving quite a bit of mental work, but we still know more than he does because we can remember it. However, at the halfway point, all hell breaks loose and the people we and Lenny learn to trust and not trust every few minutes may not be as they seem, especially Lenny himself.
- Frequency has shades of this. Although, it's less a howcatchem than a howproveit. The main characters find out who the killer is fairly early on...the problem is, they only find this out by collaborating over a 30 year time gap (they can communicate via ham radio). So, they somehow have to prove who the killer is to the cops, with evidence the cops will actually believe.
- Oldboy has the villain reveal himself to both the viewer and the protagonist partway through the film, and challenges the protagonist to figure out his motive for imprisoning him.
- Dr. Thorndyke was one of the first to do this; several of his stories will show the killer performing an apparently perfect coverup in the first half, then following it with scientific deduction through the second half.
- These were followed by Malice Aforethought (1931) by Anthony Berkeley Cox, and most of the Department of Dead Ends stories by Roy Vickers.
- The subtitle of Feet of Clay is "A Discworld Howdunnit", though the actual story is a classic whodunit.
- Although figuring out how arsenic is being administered to Vetinari is crucial to solving the who.
- Unless you're just really good at trilingual puns. It's a shame Vimes isn't.
- Word of Pterry describes both Guards! Guards! and Men at Arms in similar terms, although they're more along the lines of thrillers that happen to star policemen. Both villains think they're in an open mystery, and that they're the main villain of the piece. They're not. Their murder weapons are.
- Examples from literature, later adapted into films: The Day of the Jackal by Frederick Forsyth and A Kiss Before Dying by Ira Levin.
- Although in The Day of the Jackal the investigators locate the assassin by pusuing a line of investigation based on a false assumption regarding his true identity.
- Captain Leopold Incognito had the variation that the villain (and reader) knew Leopold would be making an undercover investigation, but did not what identity he would be using.
- Used to great effect by Mary Higgins Clark in numerous mystery novels.
- The third book of the Dream Park series, The California Voodoo Game. The first two books were Whodunits; in this one, almost at the start, we see the villain kill someone to help cover up a theft, but we're not told what the theft is. So not only do we read to see how the heroes figure him out and catch him, but to discover what was stolen. Has two brilliant The Plans colliding one from each side.
- The Demolished Man by Alfred Bester spends its first five chapters showing a man commit an incredibly complex murder, then the rest of the book follows the officer who suspects he did it and is trying to prove it. Subverted a bit because even the killer isn't completely aware of his own motivation for the crime, which proves to be a pretty big obstacle for the officer to overcome.
- The Isaac Asimov short story The Singing Bells opens with the murder, and then introduces the detective and proceeds to the investigation.
- Almost everything written by Jeffery Deaver is this - the novels often containing passages told from the point of view of the villain early in the novel, and spend the rest of the story charting the battle of wits between the good guys and the bad.
- The James Bond novels Thunderball and (to a lesser degree) From Russia with Love feature villains putting a dastardly plot in motion, and Bond unravelling it.
- An early example is the story Ali Khwajah and the Merchant of Baghdad in One Thousand and One Nights. It's perhaps noteworthy that the criminal in this story is in no way exceptionally intelligent - he just picks a very unsuspecting victim. Still, solving the crime is so easy a child could do it...
- Red Dragon and its sequel, The Silence of the Lambs. In both of them, we know fairly early on who the killer is, and learn more details as the FBI protagonists figure out the mystery.
- Anno Dracula: The heroes are out to catch Jack the Ripper; the first chapter reveals that he is Dr. John Seward.
- Occurs in the first two Provost's Dog books alongside regular whodunnits. In Terrier, it's obvious early on that Crookshank is the one behind the fire opal disappearances, but they have a hard time finding proof. Everyone in Bloodhound also knows that Pearl Skinner is behind the counterfeits, too, but in addition to evidence they also have a Lord Provost who's terrified of her.
- Stephen King's Mr. Mercedes is about a retired cop tracking down a mass murderer. The reader knows early on who Mr. Mercedes is.
Live Action TV
- Columbo is a pioneer for the "howcatchum" style, and the creators invented the term. Rather than puzzle out the perpetrator from a variety of suspects, Columbo always focuses his investigations on the actual perpetrator and uses his unassuming style to amass enough evidence for an arrest.
- Mrs. Columbo follows a similar format.
- Some episodes of Matlock were like this.
- Monk shifted toward this after its first season.
- Although Monk's recaps still filled in a lot of gaps and would give the audience the context and usually more details of the murder itself.
- This is also played with in some cases. The exact nature of the mysteries vary to the point where what exactly is the mystery differs between each episode. Sometimes it's "who did it", and sometimes it's "how do they catch them", but sometimes the mystery ends up being "how did they do it?" or "why did they do it?". In most cases it tends to be a combination of two or more of these, but exactly which question is the primary focus differs every time.
- Diagnosis: Murder does this a great deal.
- Law & Order: Criminal Intent used this format occasionally in its first couple of seasons, showing the whole crime at the beginning and (usually) setting Goren and Eames on the culprit and harrying them into showing their hand. Later seasons show the circumstances around the murder, but leave the killer's identity ambiguous.
- Variation in Frasier. One episode starts with an entirely innocent explanation for why a cracked skull would end up under the floorboards of Frasier and Niles' old house, the remainder of the episode consists of the two of them discovering it and totally misinterpreting the evidence.
- The Police Squad!! series by Zucker, Abrahams, and Zucker.
- The CSI episode "Killer" alternates its point of view between the killer and the CSIs, showing his motivations and attempts to cover up his crime as the investigators get closer.
- The second season of Dexter is about searching for the Bay-harbor butcher, who happens to be Dexter Morgan. However, it's less about "How do they catch him" then "How does he fool them".
- Also shows up in the third and fourth seasons of Dexter.
- Episode six of The Conditions of Great Detectives is played this way. When interviewing murder suspects, the cast decide instantly who he was and the murderer, though never out-right confessing, doesn't deny that he was the murderer. The rest of the episode is Tenkaichi trying to figure out his trick: he never manages to.
- The Wire. D'Angelo: "Tap, tap, tap." Mcnulty and Bunk: "Fuck."
- The Perry Mason episode "The Case of the Lucky Loser" used this: at the very beginning, we see a man follow his cheating wife, then shoot her lover. The man's nephew is accused of the crime, and the family hires Perry to clear the nephew without implicating the uncle. Subverted when it turns out the shooting we saw wasn't really the murder. The supposed victim of the shooting was already dead, the real victim of the shooting was the murderer, and the shooter was the murder victim. It was complicated.
- Many episodes of Criminal Minds.
- Furuhata Ninzaburou is Columbo in all but name; just before the last act, the titular detective "pauses" the action to address the audience to give them hints as to why he believes that the chief suspect did it, and what evidence there is to force a confession.
- Every episode of Luther reveals the villain early on, with the drama coming from how Luther will catch the suspect.
- White Collar has shades of this. The protagonists usually figure out who the bad guy is pretty quickly, and the rest of the episode is spent on how they catch him.
- This is the whole premise of Breaking Bad: Walt is a meth cook starting in the first episode, and the DEA spends much of the series looking for New Mexico's elusive new drug dealers.
- The entire premise of Motive is that the viewer is told who the killer is within the first few minutes but you have to figure out... well, the motive. It's not a whodunit, it's a "whydunit". But, the detectives don't know who the killer is or their motive, but the answer to both is revealed in the ensuing investigation.
- Since Hannibal is a prequel to the Hannibal Lector film and book series (barring Hannibal Rising, which takes place even earlier), the entire series is based around the build-up to Hannibal's eventual capture by Will. They also show us some of the other killers in advance.
- The first case in most Ace Attorney games is one of these, with the murderer being shown for the player's benefit in the opening cutscene and then serving as the all-too-obvious Warm-Up Boss. The most notable aversions are the third and fourth games' first cases, which are more standard whodunnits partly because in both cases the real murderer is played much more seriously and continue on to be the game's respective Big Bad even after their initial defeat. The fourth game's first case even serves as its Wham Episode.
- Sometimes true nature of the guilty party is obvious when you see them for the first time, but other times they pull a U-Turn and make it someone you aren't expecting. ...Then other times, they'll know that players are expecting a U-Turn so won't give you one, instead making the real culprit the person all the evidence has been pointing to. All in all, the series does all three examples so sporadically that you usually can't tell if you should be looking out for the too obvious culprit, the so-completely-innocent-looking culprit, or the in-your-face culprit.
- On occasion, this also happens with the second cases, such as the first game and Dual Destinies. And even the third case in Trials and Tribulations shows you the killer at the start.
- The first murder in Dangan Ronpa is an unintentional example, as the victim literally writes the killer's name in their own blood, but upside-down, and in enough of a way that the non-native English speaking cast mistakes it for something else entirely (as a Japanese audience would most likely assume as well.) Western players, however, would see the clue for what it is right away, and thus the mystery for them is more about how the killer did the deed.
- Former Attorney General Robert Kennedy once formed a task force known as the "Get Hoffa Squad" whose sole purpose was to find incriminating evidence on Teamster leader Jimmy Hoffa. Three years later, they secured a conviction.
- This is very common in corruption or organized crime cases, where the problem is not knowing who the bad guy is, but building a case against him.
- Another example of the same thing was the case against Al Capone. It wasn't a question of proving he was behind any particular crime, as everyone knew he was. It was a case of finding a case where his direct involvement in illegal activities could be proven, since he could otherwise claim any particular crime was one of his Evil Minions getting out of hand. Eventually they got a conviction... for tax evasion.