During an effort to identify a killer, a traitor, The Mole, or some other unsavory individual, a character specifically raises the possibility of themselves being the culprit. They may simply be that intellectually honest, or want to impart to the other characters that no one should be considered Beneath Suspicion.
That said, this isn't an actual confession; a character who indulges in this trope does not claim that they are the culprit, they simply acknowledge that they shouldn't be trusted solely on their word.
- Played with in the June Bride case of Detective Conan - when the bride of a wedding is poisoned, Magure dismisses the bride's father (Magure's boss actually!) initially since he cannot possibly have been responsible. However, the father steps in and says that in order for Magure to do his job fairly, he should be treated as a suspect regardless of who he is.
- In Death Comes as the End, Renisenb and Hori meet with the family matriarch Esa to discuss the mysterious string of deaths in the family. Esa outright says that anyone could be the killer, no matter how unlikely-seeming — including the three of them. Esa even suggests a plausible motive that could have driven her to commit the murders, as does Hori.
- The Corrupted Chronicles of Coco Claramisa: Upon another performer of the circus being murdered, Natricia announces there to be four possible suspects. Out of the four, Natricia includes herself due to the fact that she knew the item used for the murder would be involved.
- And Then There Were None: After the murder of General Macarthur, Judge Wargrave admits he does not have a good alibi — he was sitting by himself on the terrace at the approximate time of Macarthur's death. He gives his word that he never left the terrace, but in the spirit of intellectual honesty he says that his word is insufficient without proof... and that practically everyone present is in the same uncomfortable situation.
- In American Vandal, Peter insists on being suspected as the one who drew the dicks. The problems come for him and his best friend, Sam, when he insists on treating Sam like a suspect, too, and while both are genuinely innocent, Sam takes issue to how Peter makes him look like a creepy stalker.
- Team Fortress 2: In the video "Meet the Spy", the BLU Spy tells his teammates that anyone in the building might be a disguised RED Spy, stressing that "He could be you! He could be me!" This doesn't end well for him, as the BLU Soldier immediately kills him. The RED Spy is later revealed to be disguised as the BLU Scout.
- Pathologic: In Daniel's storyline, Georgiy Kain, the head of the powerful Kain family, warns Daniel that each of the town's three most powerful families will present things with their own bias — including his own side. He encourages Daniel to trust no one blindly, not even Georgiy himself, but to listen to all three viewpoints and form his own opinion about the situation.
- Danganronpa V3: Killing Harmony:
Maki: ...Am I a suspect?
- In case 1, Maki reminds Kaede that everyone—including her—should be considered possible suspects for the murder.
Kaede: Oh, no! That's not what I meant—
Maki: You should suspect me. In fact, you should be suspicious of everyone.
Maki: Someone got killed right after we all gathered here. The timing is too perfect. [...] So trust no one, Kaede... Or you'll lose, got it?
Shuichi: Ah, don't worry... you're not a likely suspect...
- In the same chapter, Kaito calls out Shuichi (the insecure Ultimate Detective) for excluding him from the list of suspects without a good reason.
Kaito: Hey, that's not something a detective should say!
Kaito: If you suspect me, you better pursue it to the end. Investigate until you're satisfied. If you don't do that, you'll never reach the truth. Rantaro will have died for no reason. This is where you need to let your Ultimate talent shine!
- Umineko: When They Cry: Ange adopts this stance when she first appears to help Battler in the fourth game. She wants Battler to stay on his guard, think his moves through carefully, and trust no one blindly, so she insists that he should even treat Ange's own words with suspicion.
Ange: I am your ally. And an enemy of witches. ......Of course, you don't have to believe it. No one can prove that I really am your ally. On the contrary, it's more desirable that you keep your guard up strongly enough to find me very suspicious. [...] I'll offer you advice in a way that works to your advantage. Of course, you shouldn't swallow everything I say. Because no one can provide certain proof that I'm your ally. So I don't need you to unconditionally trust me. You might as well take my advice as nothing more than an opinion to be considered.
- SCP Foundation: SCP-086 is either the former Foundation administrator Dr. [REDACTED], or an entity pretending to be Dr. [REDACTED]. Either way, it outright acknowledges that it could be an impostor and insists on being treated with exactly the same degree of distrust as all other SCP items. It even insists that it should be reclassified from "Safe" to a higher threat level, "Euclid", seeing as it is a sapient entity possessing all the dangerous knowledge of a Foundation administrator.
- The Fairly OddParents: In "Where's Wanda?", when Timmy's school project wins first prize at a movie night contest at school, Wanda gets stolen, and Timmy suspects one of his classmates, Francis, A.J., or Trixie, to have stolen her. When he says that he doesn't suspect his own father to have stolen Wanda, Mr. Turner asks Timmy why he can't be a suspect, and lists a series of minor felonies he did, such as ripping the tags off of mattresses, and jaywalking.
- Bob's Burgers: In the Thanksgiving episode, "Turkey in a Can," Gayle interrupts while Louise is listing off everyone's motives for putting the turkey in the toilet.
Gayle: Maybe it was me!Bob: Was it?Gayle: No. I just started to feel left out.