A week later, Marion's sister Lila arrives in Fairvale and confronts Sam about Marion's whereabouts. Private investigator Milton Arbogast approaches them and confirms that Marion is wanted for theft. Arbogast sleuths local lodgings and discovers that Marion spent a night at the Bates Motel. He questions Norman, whose stammering and inconsistent answers arouse his suspicion. Norman refuses to allow Arbogast to speak with his mother. Arbogast updates Sam and Lila about his search for Marion and promises to phone again soon. When Arbogast enters the Bates' home searching for Norman's mother, a shadowy figure stabs him to death.