Blair Sullivan is one of the villains of the book and the 1995 thriller/mystery, Just Cause.
He was played by Ed Harris.
Sullivan is a serial killer who preys on children. He is sentenced to die for raping and murdering several little girls. A religious fanatic, he believes that he has "power that goes beyond these four walls", and that he can bring divine retribution down on anyone he wants.
Anti-death penalty activist Paul Armstrong interviews Bobby Earl Ferguson, who was sentenced to death for raping and murdering a little girl named Joanie Shriver, and Bobby Earl tells him that Sullivan is the real killer. Armstrong interviews Sullivan, who toys with Armstrong by giving him cryptic clues about the location of the murder weapon. Armstrong finds it, and Bobby Earl is exonerated.
Armstrong gets a call from Sullivan, who tells him that his death warrant has been set in motion and to go to his parents and tell them that he loves them and that he will keep them in his prayers. Armstrong does so and discovers the butchered corpses of Sullivan's parents. He goes to Sullivan, who then explains that Bobby Earl and he made a deal: Bobby Earl would kill his parents and Sullivan would take credit for killing Joanie. Sullivan demands Armstrong to tell him what happened to his parents. Armstrong lies to him, saying that they forgive him. Enraged, Sullivan screams that Armstrong will pay for toying with him. Moments later, Sullivan is executed in the electric chair.