Gregg O. McCrary is a former FBI agent who served from 1969 to 1995 and later worked as an expert witness, consultant and author. He has taught as an adjunct forensic psychology professor at Nova Southeastern University in Fort Lauderdale and at Marymount University in Arlington, Virginia, and was a contributing author to the 1992 Crime Classification Manual. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/
Sources
Gregg McCrary (Wikipedia)
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