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Robert Ressler, American FBI agent and author (born 1937)
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Robert Ressler
FBI criminal profiler (1937–2013)
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…Source: Wikipedia (CC BY-SA)
Federal Bureau of Investigation
U.S. federal law enforcement agency
The Federal Bureau of Investigation (FBI) is the domestic intelligence and security service of the United States and its principal federal law enforcement agency. An agency of the United States Department of Justice, the FBI is a member of the U.S. Intelligence Community and…Source: Wikipedia (CC BY-SA)