Dr John Gall is a consultant forensic physician. He is Director of Southern Medical Services Pty Ltd; Associate Professor in the Department of Paediatrics at The University of Melbourne; Consultant at the Victorian Forensic Paediatric Medical Service at the Royal Children's Hospital and Monash Medical Centre; President of the World Police Medical Officers; and Vice-President of the Australasian Association of Forensic Physicians. Jason Payne-James is a Consultant Forensic Physician & Specialist in Forensic & Legal Medicine. He is Honorary Consultant at the Paediatric & Emergency Medicine at St George's Hospital, London; Honorary Senior Lecturer at the Cameron Forensic Medical Sciences, Barts and the London SMD; President at the Faculty of Forensic & Legal Medicine (Royal College of Physicians); and Director of Forensic Healthcare Services Ltd.