Roy Hazelwood

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Roy Hazelwood is a well-known profiler of sexual crimes and is generally regarded as the pioneer of such profiling. He works for the Federal Bureau of Investigation. In 1980, he developed the distinction between "organized" and "disorganized" murderers, a concept that is still used by law enforcement to help in the apprehension of criminals.

He also defined the four categories of rapists, which are power-reassurance, power assertive, anger retaliatory and anger excitation. Of the four, anger excitation is by far the most dangerous and the hardest to capture.

Hazelwood has also offered the idea that there is no cure for pedophiles or sexual sadists. He has conducted numerous studies involving sexual crime, including cases of autoerotic asphyxiation. He has done numerous studies involving the willing victims of sexual sadists (wives and girlfriends) and how sexual sadists appear in every day life.

Hazelwood is now retired, and doing work around the world when he can. He continues to work closely with the FBI and other government agencies in an effort to track down sexual criminals.