Scott soon comes to the monitoring room, with his accomplice (Kyle Turley), who is revealed to be an inmate from the mental hospital they both recently escaped from. He goes on to reveal that he is, in fact, Scott's twin brother, William, and that he murdered Scott before they left for the party. William tells Marcus he blames him for the deaths of his parents all those years ago as he was the one that wanted to play Seventy Five. William then turns on his accomplice, stabbing him, before a fight breaks out between him, Karina and Marcus. Eventually, William stabs Karina to death. While Marcus swings the axe to kill William, Detectives Anne and John arrive and shoot Marcus, believing he is the killer. As Anne and John comfort William, the accomplice rises with an axe and swings it towards the detectives.