The FBI has been developing and providing profiles on unknown subjects — or unsubs — for last 50 years using science.

There’s a new book that describes the very first profile of an unknown subject. Shadow Man: An Elusive Psycho Killer and the Birth of FBI Profiling by true crime writer and novelist Ron Franscell, tells the story of David Meyerhofer, a Montana man who killed four people in the late 1960s and early 1970s. The FBI and police were unable to track down the killer for years and although the never used before profile didn’t solve the crime, it was very accurate in describing Meyerhofer.

Ron Francell discusses this fascinating case on Tuesday’s Smart Talk.

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