Gregg McCrary is one of the world's most experienced profilers. As a Supervisory Special Agent with the FBI's Behavioral Science Unit, he reported directly to BSU chief John Douglas, and with other experts, developed the Crime Classification Manual, a system for standardizing violent crimes into categories. Since retiring from the FBI in 1995, he has taught forensic psychology at Marymount University and Nova Southeastern University. McCrary continues to consult and provide expert testimony in cases in which crime scene analysis is key, and provides expert commentary to NBC, ABC, CBS, and CNN.
Mark Leibovich is The New York Times Magazine chief national correspondent, based in Washington, D.C.���011, he received a National Magazine Award for his story on Politico's Mike Allen and the changing media culture of Washington. Prior to coming to the Times Magazine , Leibovich was a national political reporter in the Times' DC bureau. He has also worked at The Washington Post , The San Jose Mercury News and The Boston Phoenix , and is the author of The New Imperialists , a collection of profiles on technology pioneers. Leibovich lives with his family in Washington.