One of the first criminal profilers who worked as a special agent for the Federal Bureau of Investigation and wrote several criminal psychology texts.
He earned a PhD from Nova Southeastern University that specialized in educating police officers to classify homicides.
He has interviewed several infamous criminals such as Charles Manson.
He was born in Brooklyn and studied his undergrad at Eastern New Mexico University.
Thomas Harris, author of the Hannibal series, used him as a model for his major character Jack Crawford in a couple of his books.