As "Mother", Norman killed two young girls prior to Marion, as well as Arbogast.
Norman discovers the murder and assumes his mother is responsible.He cleans up the crime scene, putting Marion's corpse and her possessions—including the embezzled money—into the trunk of her car and sinking it in the swamps near the motel.He recreated his mother in his own mind as an alternate personality, dressing in her clothes and talking to himself in her voice.This "Mother" personality is jealous and possessive: whenever Norman feels attracted to a woman, "Mother" kills her.Before Norman can attack Lila, Sam, having regained consciousness, subdues him.
At the courthouse, a psychiatrist explains that Norman murdered Mrs.He checks the motels, and Norman's evasive and inconsistent answers arouse his suspicions.After hearing that Marion met Norman's mother, he asks to speak with her, but Norman refuses. He goes to the Bates' home in search of Norman's mother; as he reaches the top of the stairs, he is murdered. Lila and Sam go to the local sheriff, who informs them that Mrs.A week later, Marion's sister Lila arrives in Fairvale and confronts Sam about the whereabouts of her sister.Private investigator Milton Arbogast approaches them and confirms that Marion is wanted for stealing the ,000.Moved by Norman's story, Marion decides to go back to Phoenix in the morning to return the stolen money, and prepares for bed.