William Mary "Billy" Tauros is a fictional character from the Murderous hexalogy, serving as a minor villain in the prequel and then the main antagonist in third movie.
Murderous Origins – Cain CromwellEdit.
Chandler mentions Billy during Cain's police interview.
Murderous V – Judgement DayEdit
Billy appears as an halluctionation during Cain's final moments.
After Cain dies, Billy appears as Cain's life flashes before him, showing all the lives Cain has ruined.