Gregg O. McCrary (born September 10, 1945) is a former

FBI The Federal Bureau of Investigation (FBI) is the domestic Intelligence agency, intelligence and Security agency, security service of the United States and Federal law enforcement in the United States, its principal federal law enforcement ag ...

agent who served from 1969 to 1995, an expert witness and consultant, an author and an adjunct

forensic psychology Forensic psychology is the application of scientific knowledge and methods (in relation to psychology) to assist in answering legal questions that may arise in criminal, civil, contractual, or other judicial proceedings. Forensic psychology includes ...

professor at

Nova Southeastern University Nova Southeastern University (NSU) is a Private university, private research university in Florida with its main campus in Fort Lauderdale-Davie, Florida, Davie, Florida, United States. The university consists of 14 colleges, offering over ...

in Fort Lauderdale, and at

Marymount University Marymount University is a Private university, private Catholic university with its main campus in Arlington County, Virginia, United States. It was founded as Marymount College in 1950. Marymount offers bachelor's, master's and doctoral degre ...

Arlington, Virginia Arlington County, or simply Arlington, is a County (United States), county in the U.S. state of Virginia. The county is located in Northern Virginia on the southwestern bank of the Potomac River directly across from Washington, D.C., the nati ...

. McCrary was a contributing author to the 1992 ''

Crime Classification Manual ''Crime Classification Manual: A Standard System for Investigating and Classifying Violent Crimes'' (1992) is a text on the classification of violent crimes by John E. Douglas, Ann W. Burgess, Allen G. Burgess, and Robert K. Ressler. Overvie ...

''.

Career

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 Offender profiling, also known as criminal profiling, is an investigative strategy used by law enforcement agencies to identify likely suspects and has been used by investigators to link cases that may have been committed by the same perpetrato ...

and threat analyst in

Quantico, Virginia Quantico (; formerly Potomac) is a town in southeastern Prince William County, Virginia, United States. The population was 578 at the 2020 United States Census, 2020 census. Quantico is approximately 35 miles southwest of Washington, D.C., bound ...

. He was a member of the "Criminal Investigative Analysis" subunit of the

National Center for the Analysis of Violent Crime The National Center for the Analysis of Violent Crime (NCAVC) is a specialist FBI department. The NCAVC's role is to coordinate investigative and operational support functions, criminological research, and training in order to provide assistanc ...

(NCAVC), serving the center from its foundation in 1985. Since retiring from the FBI, McCrary has served as an

expert witness An expert witness, particularly in common law countries such as the United Kingdom, Australia, and the United States, is a person whose opinion by virtue of education, training, certification, skills or experience, is accepted by the judge as ...

. British author

Colin Wilson Colin Henry Wilson (26 June 1931 – 5 December 2013) was an English existentialist philosopher-novelist. He also wrote widely on true crime, mysticism and the paranormal, eventually writing more than a hundred books. Wilson called his p ...

dedicated his 1990 book ''The Serial Killers'' to Agent McCrary.

References

1945 births Living people American criminologists Federal Bureau of Investigation agents Law enforcement officials from Virginia Marymount University alumni Marymount University faculty Nova Southeastern University faculty Offender profiling {{US-writer-stub