10 More Horror Movie Characters Who Didn't Know They Were The Killer

10. Sam Wescott - You Might Be The Killer

Let's kick things off with a rather tongue-in-cheek example, with the aptly-titled 2018 horror-comedy You Might Be the Killer.

The story kicks off with camp counsellor Sam (Fran Kranz) calling up his horror enthusiast friend Chuck (Alyson Hannigan) for help when a masked murderer begins slaughtering the camp's other counsellors.

Sam curiously suffers blackouts throughout the story, and given that he's also covered in blood, holding the killer's knife, and has possession of their very distinct mask, he and Chuck are forced to come to the inevitable conclusion that he must in fact be the killer himself.

And indeed, Sam is the film's primary killer, albeit through no real fault of his own given that he gets possessed by a cursed mask which is first placed on his head as a seemingly harmless gag by a fellow counselor.

Ultimately Sam leaves a pile of bodies in his wake regardless before eventually being killed at the end by another counselor, Jamie (Jenna Harvey), who also dons the mask.