Professor of Developmental Psychopathology at the Clinical, Educational, and Health Psychology Research Department, Division of Psychology and Language Sciences, University College London, United Kingdom

Practicing Attorney

Author of two international best-selling memoirs about an experience with a psychopath. Speaker, writing coach & self-publishing consultant, United Kingdom

Clinical Psychologist, Professor of Psychology, University of Waikato, New Zealand

Director of Psychiatry Services at Saint Elizabeths Hospital, Washington, D.C.

Distinguished Professor, Psychology, University of Pittsburgh

Director, Forensic Psychiatry Fellowship St. Elizabeths Hospital, Harvard University

Licensed Clinical Psychologist. Founder & Director of the Center for Child Behavior

Founder of Parents of Children with Conduct Disorder

Professor and Director of Forensic Science Program, George Mason University