He is also the Director of Drexel’s JD/PhD Program in Law and Psychology. His research interests include psychopathic personality, forensic mental health assessment, offender diversion, and drug-involved criminal offenders. His research has been funded by several federal agencies, state agencies, and private foundations. DeMatteo has co-authored several books and more than 100 articles and book chapters – he has given over 200 presentations at national and international conferences. He was Chair of APA’s Committee on Legal Issues. He is a Fellow of the American Psychological Association (Divisions 12 and 41), a Fellow of the American Academy of Forensic Psychology, and board certified in forensic psychology by the American Board of Professional Psychology. DeMatteo is a past President of the American Psychology-Law Society (APA Division 41).