Andy Griffiths is a Research Fellow at the University of Portsmouth, UK, Associate Tutor at the College of Policing, and international Consultant. He is both a former Senior Investigating Officer (SIO) and head of major crime for a UK police force, having completed thirty years service specializing in interviewing and investigation, and during which he led numerous major crime investigations. During his police service he was awarded a PhD for his research on investigative interviewing and spent time as a Visiting Professor at John Jay College, New York.

Rebecca Milne is a Professor of Forensic Psychology at the Institute of Criminal Justice Studies, University of Portsmouth, UK, and Director of the Centre of Forensic Interviewing, an internationally recognised centre of excellence for investigative interviewing bringing together research, teaching, and innovation. She is also a member of the UK National Police Chiefs' Council, Investigative Interviewing Strategic Steering Group, and a member of the UK Centre for Research and Evidence on Security Threats (CREST)