The Most Intelligent Serial Killer - Crime Documentaries 2015

The Most Intelligent Serial Killer

A serial killer is a person who has murdered three or more people over a period of more than a month, with down time (a "cooling off period") between each of the murders.[3][4] Some sources, such as the FBI, disregard the "three or more" criterion and define the term as "a series of two or more murders, committed as separate events, usually, but not always, by one offender acting alone" or, including the vital characteristics, a minimum of two murders.
The motivation for serial killing is usually based on psychological gratification. Most serial killings involve sexual contact with the victim, but the FBI states that motives can include anger, thrill, financial gain, and attention seeking.[5] The murders may be attempted or completed in a similar fashion and the victims may have something in common: race, appearance, sex, or age group, for example.[7]
Serial killing is not the same as mass murdering, nor is it spree killing, in which murders are committed in two or more locations in a short time and experienced as a single event. However, cases of extended bouts of sequential killings over periods of weeks or months with no apparent "cooling off" period or "return to normalcy" have caused some experts to suggest a hybrid category of "spree-serial killer".
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