Dr. Katherine Ramsland, Ph.D., is a professor of forensic psychology at an assistant provost at DeSales University in Pennsylvania. She has published over 1,000 articles, stories, and reviews, and 65 books, including The Psychology of Death Investigation, Forensic Investigation: Methods from Experts, Confession of a Serial Killer: The Untold Story of Dennis Rader, the BTK Killer; The Mind of a Murderer; The Forensic Science of CSI; Inside the Minds of Serial Killers, and The Forensic Psychology of Criminal Minds. She presents workshops to law enforcement, psychologists, coroners, and attorneys, and has consulted for several television series, including The Alienist, CSI and Bones. She writes a regular blog for Psychology Today and has appeared in more than 100 crime documentaries.

Mark E. Safarik was a member of the Federal Bureau of Investigation's elite Behavioral Analysis Unit. He established himself as an internationally recognized expert in the analysis of violent criminal behavior. Safarik's law enforcement career spans over 30 years. He served 23 years with the FBI, the last 12, as a criminal profiler. He has lectured around the world, sharing his expertise in the analysis of homicide and complex crime scene behavior with over 20,000 personnel from police chiefs to violent crime investigators, prosecutors, medical examiners and other professionals. He currently consults with law enforcement, attorneys, universities, writers, television producers, and foreign government entities. Safarik has a graduate degree from Boston University and is adjunct faculty at Boston College. He has conducted internationally renowned research on the sexual assault and homicide of elder females and received the prestigious Jefferson Medal from the University of Virginia. He is a member of the highly respected Vidocq Society. He has published articles, and book chapters on his research and work. He has appeared on numerous television programs to discuss his cases and analyses. He has three cold case television series both in the US and Europe. He has been a consultant for the television series CSI: Las Vegas, Bones, and The Blacklist.