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Anime and Manga
- The The Calming Detective, Osomatsu skit of Osomatsu-san, being a parody of detective stories, plays it uniquely. In it, the characters are investigating a serial murder case. With Ichimatsu plainly standing in the background carrying bloody weapons and wearing Jason mask. Then he died later in the episode. It's unique since only the viewers experience this trope. The characters never notices Ichimatsu's existence at all, not even when he was chasing Detective Osomatsu with weapons in hand.
- The Kindaichi Case Files: Once happens in "Opera House Third Murder Case". All evidence pointed at a certain person, and thus that person was locked with the key on constant watch. In the next day, that person was found murdered. It was deliberately set up by the real killer to create this locked-room situation.
- Batman: The Gotham City Police Department once has a prime suspect in a series of brutal killings with a veritable mountain of damning evidence against him, up to and including his going around and bragging to everyone who would listen that he did it all. It turns out that all of the evidence is manipulated or outright fabricated, because the guy is trying to make a name for himself of another's deeds. For reasons beyond human understanding, he decided to pick Gotham's most infamous and self-aggrandizing mass-murderer to bite off from — The Joker. No bonus points for guessing how it ends for him.
- Gary Larson drew a Far Side strip that had the caption: "Blast! Up to now, the rhino had been my prime suspect!"
- La Belle: Happens to Master Hand and then very briefly to Isolde.
Films — Live-Action
- In Scream (1996), Billy asks, soulfully, what he has to do to prove his innocence. A second later the killer leaps into the room and stabs him. Because Scream never met a trope it didn't want to play with, it turns out Billy's the killer anyway. There were two killers and they engineered the whole thing to screw with Sidney.
- In Chaos Theory, a cop gets blown up just as fishy smell hits the air. In the usual subversion, he is not actually that dead in the end...
- Agent Kujan from The Usual Suspects tells the same subversion story about Dean Keaton. Some time in the past, when Keaton was among suspects for some crimes, he dies. Then, in a few months, witnesses die too, someone else gets convicted, and you guess it, Dean Keaton turns up quite alive and well. This episode is presented by Dave Kujan as a pinnacle of Keaton's evil, so they appear to be quite genre savvy in that regard.
- Tim Burton's Sleepy Hollow. A variant in that everyone knows that the Headless Horseman is doing all the killing, but they're trying to find the person controlling him. Lady Van Tassel decapitates a maid to serve as her corpse.
- In Sherlock Holmes novel A Study in Scarlet, Lestrade is prepared to arrest his suspect, only to find that he's already been murdered.
- The trope occurs several times in Agatha Christie's And Then There Were None. Ultimately subverted and then played straight, as the murderer faked his death precisely to eliminate himself as a suspect. Of course, then it is ultimately played straight as he then commits suicide to complete his perfect crime and, again, eliminate himself as a suspect.
- In Death Note: Another Note, the Los Angeles BB Murder Cases, Rue Ryuzaki, a.k.a. Beyond Birthday, plans to create a case that L can't solve by committing suicide and making it look like a murder. Up until this point we're led to believe that it's L, not Beyond Birthday actually doing it.
- In The Ninja, the antagonist Saigo uses the fake version of this to throw law enforcement and the antagonist Nicholas off the trail, killing a man of very similar build and chucking him off a high tower block face first to fool identification procedures. (The novel is set in 1980 before routine DNA analysis).
- In Death: This trope popped up in Innocent In Death. After Craig Foster's murder, Eve Dallas ends up focusing on Reed Williams as the prime suspect. Take a wild guess on what happens next.
- Parodied in The Macbeth Murder Mystery by James Thurber. "At first I suspected Banquo. And then of course, he was the second person killed. That was good right in there, that part. The person you suspect of the first murder should always be the second victim."
- In the Lost episode "The Other 48 Days", Nathan was suspected of being a spy from the Others. He was murdered by the real spy, Goodwin, who hid the body and let the other survivors believe that he had escaped. In this case, the action was justified in the dialogue, as he was worried that further interrogation from Ana Lucia would eventually prove that she had the wrong guy.
- Done repeatedly in Forensic Drama series such as CSI and Bones.
- Not used as much as one would suspect in the various Law and Order series, but one notable example from the SVU series involved the demise of a rapist whom everyone was convinced had killed his victim. His death started them thinking that her killer had an entirely different motive.
- Another notable example is from the original series, when a doctor who's supposed to be giving vital testimony in his daughter's case (she's up for murder, her defense is that it was assisted suicide) kills himself on the stand (via poison he administered several hours beforehand.) This, obviously, calls for a mistrial and gets him out of facing consequences even though he'd practically admitted that there were less-than-merciful motives for the "assisted suicide" all along.
- Subverted in an episode of The Persuaders! where Brett's relatives are being murdered: all the suspects die... then it's revealed that one of them was actually the murderer, and faked his death because he knew that would clear him.
- Done similarly in a Ten Little Murder Victims episode of Remington Steele.
- Ditto for a similar episode of the television program The Wild Wild West, "The Night of the Tontine".
- And the John Steed/Emma Peel The Avengers. At least once.
- The Adventures of Brisco County, Jr. has a Ten Little Murder Victims episode with a gathering of Bounty Hunters at a secluded hotel.
- In The Twilight Zone (1959) episode "Shadow Play", Dennis Weaver is on Death Row trying to convince people that the world is a nightmare he keeps having, night after night, over and over again. The Warden is finally convinced he must be insane, and calls the Governor to ask for a stay. The stay comes too late, the electric chair is fired up, and we find he was right: everyone else dies, and his nightmare starts all over again.
- Canadian comedy team Wayne and Schuster did a Sherlock Holmes skit in which everyone Holmes accused of being the murderer would then be killed in a different way, in some cases a quite ridiculous way. When he finally got down to accusing the butler, a B-52 flying overhead dropped a load of bombs, and the butler was crushed by rubble. Then Holmes realized the truth; as he told Dr. Watson: "We're in the wrong bloody house!"
- One episode of Psych had Shawn suspect a fashion mogul of killing her husband right up until she died at his funeral. He then commented "Okay, probably not the wife." Ultimately subverted when it's learned that she actually did kill him. She died from the delayed effects of him poisoning her.
- As the show reaches its later seasons, this trope starts occurring almost Once per Episode.
- In the Buffy the Vampire Slayer episode "Killed by Death", the Scoobies become convinced that the villain killing the sick children in the hospital is the creepy (and, it turns out, criminally negligent to the point of malpractice lawsuits) Doctor Backer... until Backer himself is killed by the invisible monster that is actually killing the children.
- In Sanctuary's first season episode "Kush", there's a crash, followed by several murders. When they settle things down by supposedly catching the suspect, he's killed and they have to reexamine their "fool-proof" method of determining the killer.
- The Columbo episode "Last Salute to the Commodore" starts out as a normal episode, with us seeing Charles Clay disposing of the victim's body and setting up his alibi, Lt. Columbo comes in and starts his usual harassing of the suspect, and then half way through Clay turns up dead, and the episode suddenly turns into a Whodunnit.
- This formula is repeated in "A Bird in the Hand". Incidentally, both episodes were scripted by Columbo veteran Jackson Gillis.
- The pilot has the suspect Peter Saldua turn up dead. It turns out that Saldua was the one who killed the victim, her husband manipulated him into doing it and killed him and made it look like suicide.
- "Solve for X": Holmes calls Bell to tell him who he thinks the killer is, and before he has a chance to say so, Bell informs him about another victim, naturally the same man.
- In the episode of La caméra explore le temps dealing with the murder of the Duchess of Praslin, the Duke commits suicide by swallowing arsenic after his arrest, as he did in history. There is little doubt that he killed his wife anyway, the only real question being "why?", but his death came just at the right moment to spare the Chamber of Peers from having to try one of theirs.
- In the NBC Hannibal, the eponymous cannibal occasionally amuses himself by causing serial killings that he isn't responsible for to have Suspect Existence Failure.
- Inspector Lynley: "A Traitor to Memory", Lynley and Havers were almost certain that it was ex-husband Richard who killed Eugenie Martin, until he is murdered in the same way.
- the best part? in the original novel, Richard was the killer - it was switched to Raphael due to Adaptation Distillation (see above), so they weren't actually that far off.
- Murder Rooms: "The White Knight Stratagem".
- A Garry's Mod game mode named Trouble In Terrorist Town can have this happen as a traitor kills a suspect or even more likely the innocents killing off a suspect who was actually a innocent.
- The final case of Apollo Justice: Ace Attorney had the prime suspect of a poisoning case collapse while on the witness stand, having somehow ingested the same type of poison that killed the victim. This does not absolve her of guilt, as the prosecution claims that she attempted suicide out of remorse. As the suspect was still alive but in critical condition following the collapse, the prosecution insists that they finish the trial and come to a verdict before the suspect actually dies, since a verdict can't be assigned to a dead person.
- Played with in Discworld Noir. Vimes definitely sees Lewton dying as this, but Lewton had actually managed to come Back from the Dead (not that he was guilty of the murders anyway).
Vimes: My lead suspect was killed.Vetinari: Hmmmm... that is very unfortunate.Vimes: It certainly was for Lewton.
- Parodied in Futurama, "Anthology of Interest", where Zoidberg's summation is repeatedly interrupted by this. Further twisting it is that the new victims each figure out who the real killer is seconds before their deaths (which is why they get killed).
- Unnecessarily lampshaded just before the end of Robot Chicken's "Michael Jackson vs. Michael Jackson" sketch.
- Sherlock Holmes in the 22nd Century: In "The Five Orange Pips", things seem to point toward to poisoning victim's shifty-looking brother; moments after Watson becomes the first to voice the suspicion, the brother is poisoned too.