John H. Campbell, Ph.D., is a professor in the criminal justice department at St. Cloud State University, the former Unit Chief of the FBI’s Behavioral Science Unit, and the coauthor (with Don DeNevi) of Into the Minds of Madmen.

Don DeNevi is the author, coauthor, or editor of thirty-five books, including Profilers: Leading Investigators Take You Inside the Criminal Mind and Into the Minds of Madmen: How the FBI’s Behavioral Science Unit Revolutionized Crime Investigation (both with John H. Campbell).