Learning that Ruth's engagement ring is also stolen property, and that she is engaged to Niles, Muldoon and Halloran take Ruth to Niles' apartment, where they coincidentally interrupt someone trying to murder him. The killer takes a shot at the cops and escapes down the fire escape onto the nearby elevated train. When questioned about the stolen jewelry, Niles claims that they were all presents from Jean, which reveals his true relationship with her, much to Ruth's chagrin. Ruth realizes she is engaged to a swindler and slaps him. Niles is then arrested for the jewel thefts, but the murder case remains open.