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In criminology, a disorganized offender is a type of serial killer classified by unorganized and spontaneous acts of violence. The distinction between "organized" and "disorganized" offenders was drawn by the American criminologist John Douglas and Roy Hazelwood . [ 1 ]
One of the first American profilers was FBI agent John E. Douglas, who was also instrumental in developing the behavioral science method of law enforcement. [3]The ancestor of modern profiling, R. Ressler (FBI), considered profiling as a process of identifying all the psychological characteristics of an individual, forming a general description of the personality, based on the analysis of the ...
Ted Bundy and John Wayne Gacy are examples of organized serial killers. [81] In general, the IQs of organized serial killers tend to be normal range, with a mean of 98.7. [82] Disorganized serial killers are usually far more impulsive, often committing their murders with a random weapon available at the time, and usually do not attempt to hide ...
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Also, he studied and found specific physical characteristics; some examples included asymmetry of the face, eye defects and peculiarities, ears of unusual size, etc. [9] One of the first offender profile was assembled by detectives of the Metropolitan Police on the personality of Jack the Ripper , [ 10 ] a serial killer who had murdered a ...
The next section begins with a focus on the three different categories of serial killer: organized, disorganized, and mixed (someone who displays both organized and disorganized traits). Angelo Colalillo and David Threinen are used as examples of organized offenders, Braeden Nugent and Carl Hall as examples of disorganized offenders, and Donald ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 27 February 2025. A serial killer is typically a person who kills three or more people, with the murders taking place over more than a month and including a significant period of time between them. The Federal Bureau of Investigation (FBI) defines serial murder as "a series of two or more murders ...
Richard Benjamin Speck (December 6, 1941 – December 5, 1991) was an American mass murderer who killed eight student nurses in their South Deering, Chicago, residence via stabbing, strangling, slashing their throats, or a combination of the three on the night of July 13–14, 1966.