American criminologist
According to Wikipedia, Gregg O. McCrary is a former FBI agent who served from 1969 to 1995, 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.
Gregg McCrary is affiliated with the following schools: