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About Gregg McCrary
- Gregg O.
- McCrary is a former FBI agent, an expert witness and consultant, an author and an adjunct forensic psychology professor at Nova Southeastern University in Fort Lauderdale, and at Marymount University in Arlington, Virginia.
- McCrary was a contributing author to the 1992 Crime Classification Manual.In 2003, he published The Unknown Darkness, a book detailing those cases which he found most important.
- During his tenure with the FBI, McCrary was a criminal profiler and threat analyst in Quantico, Virginia.
- He was a member of the "Criminal Investigative Analysis" subunit of the National Center for the Analysis of Violent Crime (NCAVC), serving the Center from its foundation in 1985.
- Since retiring from the FBI, McCrary has served as an expert witness.British author Colin Wilson dedicated his 1990 book The Serial Killers to Agent McCrary.
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