Robert K. Ressler

Born: 1937-02-15

Robert Kenneth Ressler was an American FBI agent and author. He played a significant role in the psychological profiling of violent offenders in the 1970s and is often credited with coining the term "serial killer", though the term is a direct translation of the German term Serienmörder coined in 1930 by Berlin investigator Ernst Gennat. After retiring from the FBI, he authored a number of books on serial murders, and often gave lectures on criminology.


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Serial Killers: The Real Life Hannibal Lecters

as Self
Released: 2001-01-01

This documentary examines a selection of real life serial killers and compares them to the...

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Murder: No Apparent Motive

as Self
Released: 1984-04-24

This documentary about serial killers and FBI Behavioral Sciences profilers features interviews...

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John Wayne Gacy: Devil in Disguise

as Self - Ret. FBI Profiler (archive footage)
First aired: 2021-03-25

The chilling story of one of the world’s most notorious serial killers told through the words of...

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