The Lodger

On hearing reports of the seventh murder by "The Avenger", Daisy decides to stay with her parents. She is being courted by Joe, a detective, who gets suspicious when her mother rents a room out to a lodger - to whom Daisy is attracted. While the lodger is out Joe takes the opportunity to search his room - there he finds a gun, press clippings of the killings and a map of the murders. (Network)