Robert Keppel (Author)
Robert D. Keppel is the retired chief criminal investigator for the Washington State Attorney General's office. He has a Ph.D in Criminal Justice from the University of Washington and has been an investigator or consultant to over 2000 murder cases and over 50 serial murder investigations, including the Atlandta Child Murders and the Green River Murders.
William J Birnes (Author)
William J. Birnes is a New York Times best-selling author. He has written over twenty-five books across the fields of human behavior, true crime, currentaffairs, history, psychology.