No Witnesses. No Leads. No Problem. 7.90/10 2011-06-17 23 minutes.HDCreating a “profile” of a serial killer is part science and part intuition. The science involves studying criminals who have committed similar crimes, to see what characteristics they have in common. In a search for the killer of two teenagers in Texas, a behavioral profile led to a possible suspect - and hard science proved the profile was correct; it shows a behavioral study on how most serial killers also have a history of abusing animals.An: 2011Studio: TLC, truTV, Court TVPays: United States of America, Germany