After Norman's arrest, forensic psychiatrist Dr. Richmond (Simon Oakland) tells Sam and Lila that Norman's dead mother is living in Norman's psyche as an alternate personality. After the death of Norman's father, the pair lived as if they were the only people in the world. When his mother found a lover, Norman went mad with jealousy and murdered them both. Consumed with guilt, Norman "erased the crime" by bringing his mother back to life in his mind. He stole her corpse and preserved the body. When he was "Mother", he acted, talked, and dressed as she would. The psychiatrist concludes that the "Mother" personality now has complete control of Norman's mind.