Among the initial criminal profilers who have worked as a particular agent for the Federal government Bureau of Analysis and wrote several lawbreaker psychology text messages. He gained a PhD from Nova Southeastern College or university that specific in educating cops to classify homicides. He offers interviewed many infamous criminals such as for example Ted Bundy, Gacy, and Charles Manson. He was created in Brooklyn and researched his undergrad at Eastern New Mexico College or university. Thomas Harris, writer of the Hannibal series, utilized him like a model for his main character Jack port Crawford in several his books.