Marion's sister Lila arrives in Fairvale a week later, tells Sam about the theft, and demands to know where Marion is. He denies knowing anything about her disappearance. A private investigator named Arbogast approaches them, saying that he has been hired to retrieve the money. He stops at the Bates Motel and questions Norman, whose nervous behavior and inconsistent answers arouse his suspicion. He examines the guest register and discovers from her handwriting that Marion spent a night in the motel. When Arbogast infers from Norman that Marion had spoken to his mother, he asks to speak to her, but Norman refuses to allow it. After he enters the Bates home to search for Norman's mother, the shadowy figure emerges from the bedroom and stabs him to death.