Dousemetzis collaborated closely in his research and the evaluation of the evidence with Advocate George Bizos, Professor John Dugard, former KwaZulu-Natal state attorney Krish Govender, Advocate Dumisa Ntsebeza and former Judge Zak Yacoob, while he also consulted Professor Alban Burke, Head of the Department of Psychology at the University of Johannesburg; Professor Kirk Heilbrun, forensic psychologist and Professor of Psychology at Drexel University in Philadelphia, Pennsylvania; Professor Phillip Resnick, forensic psychiatrist and Professor of Psychiatry and Director of the Division of Forensic Psychiatry at Case Western Reserve University School of Medicine in Cleveland, Ohio; Professor Robert L. Sadoff, clinical Professor of Psychiatry and Director of the Center for Studies in Social-Legal Psychiatry at the University of Pennsylvania, and former president of the American Academy of Psychiatry and the Law, as well as of the American Board of Forensic Psychiatry, and Professor Tuviah Zabow, forensic psychiatrist, former head of the forensic psychiatry unit at Valkenberg Hospital and former Professor of Psychiatry at the University of Cape Town.