Mark Costanzo, Ph.D. is Professor of Psychological Science at Claremont McKenna College, Co-Director of the Center for Applied Psychological Research, and a member of the Plenary Faculty at Claremont Graduate University. He has published research on a variety of law-related topics including police interrogations, false confessions, jury decision-making, sexual harassment, attorney argumentation, alternative dispute resolution, and the death penalty. Professor Costanzo is co-author of the leading textbook on Psychology and Law - Forensic and Legal Psychology (4th edition). He is also author of the books Psychology Applied to Law and Just Revenge. He is co-editor of several books, including Violence and the Law and Expert Psychological Testimony for the Courts.
Professor Costanzo has also served as a consultant or expert witness for more than 400 criminal cases involving coerced and potentially false confessions. This consulting includes cases in state, federal, and military courts. Professor Costanzo has received Outstanding Teaching and Mentoring Awards from the American Psychology-Law Society, the Society for the Psychological Study of Social Issues, the Western Psychological Association, and the Society for the Teaching of Psychology. He is currently serving as President of the Western Psychological Association.