Raising Cain

Raising Cain is a 1992 psychological thriller film written and directed by Brian De Palma, and starring John Lithgow, Lolita Davidovich and Steven Bauer.

Jenny is having an affair with Jack Dante Steven Bauer, the widower of a former patient. She had a relationship with him years ago, but he left her. Now she plans to leave Carter and elope with him. When Carter accidentally discovers their tryst, he descends completely into his madness and begins leaving subtle clues for the police that Jack is the real killer. Next, he attempts to kill Jenny by submerging her car in a lake. She escapes and confronts Carter at home. Unable to find Amy, Jenny demands Carter tell her where she is. Carter replies that she is with his father, whom Jenny knows has been dead for years.Carter is apprehended for attempted murder. The police bring Dr. Lynn Waldheim Frances Sternhagen to interrogate him. Waldheim interviews Carter and informs the police that she cowrote a book with Nix Sr. called Raising Cain, about a boy with multiple personality disorder. Nix Sr. had extensive detailed knowledge of Cains tortured childhood, including taped recordings of their sessions. However, Waldheim was never allowed to meet Cain. She pieced the situation together Nix Sr. dispassionately put his own son through years of severe child abuse to gain firsthand accounts of his traumatic psychological development and study the emerging personalities. Horrified, Waldheim quit the project. ........

Source: Wikipedia