Katherine Ramsland has a masters degree in forensic psychology from John Jay College of Criminal Justice, a masters degree in clinical psychology, and a PhD in philosophy. She has published twenty-seven books, including Inside the Minds of Mass Murderers, The Science of Cold Case Files, The Criminal Mind: A Writers Guide to Forensic Psychology, The Forensic Science of CSI, and The CSI Effect. With former FBI profiler Gregg McCrary she coauthored The Unknown Darkness: Profiling the Predators among Us, and with law professor James E. Starrs, A Voice for the Dead. In addition, Ramsland has published over three hundred articles on serial killers, criminology, and criminal investigation and was a research assistant to former FBI profiler John Douglas for The Cases that Haunt Us. She writes forensic articles for Court TVs Crime Library and teaches forensic psychology as an assistant professor at DeSales University in Pennsylvania.