Inside the mind of sexual serial killers

Police still don't know the identity of Robert Shulman's second victim, found mutilated behind a Yonkers pizza place 25 years ago. In this episode, Crime Scene talks with veteran homicide detective Vernon Geberth, called "Mr. Murder," about how sexual serial killers like Shulman operate, and with Det. John Geiss, whose job it is to identify the woman who has become known as the "Yonkers Jane Doe."