David A. Crighton is Consultant Psychologist and Hon. Professor of Forensic Psychology at Durham University. He was formerly Deputy Chief Psychologist in the UK Ministry of Justice. He is a past Chair of the BPS Expert Witness Advisory Group and a past Secretary and Treasurer of the British Psychological Society, Division of Forensic Psychology.
Graham J. Towl is Professor of Criminological Psychology at Durham University. He is a recipient of the British Psychological Society award for distinguished contributions to professional psychology and academic knowledge in forensic psychology.