Fictional character in the Showtime TV series Dexter
Arthur Mitchell (Dexter)
612, 6w7, ISTJ, Sp/So
Arthur Mitchell, often referred to as the "Trinity Killer", is a fictional character and the main antagonist of the fourth season of the Showtime TV series Dexter, and is portrayed by actor John Lithgow. Mitchell is as an unassuming church deacon and family man — who for 30 years has been living a double life as a serial killer. In the series, FBI agent Frank Lundy (Keith Carradine) dubs him the "Trinity Killer" because of a recurring pattern of three killings based on traumatic events during Arthur's childhood.