Dr. Katherine Ramsland teaches forensic psychology and behavioral criminology in the graduate program at DeSales University, where she is Professor Emerita. She has appeared as an expert on more than 250 crime documentaries and was an executive producer on Murder House Flip and A&E’s Confession of a Serial killer: BTK. The author of more than 1,800 articles and 73 books, including The Serial Killer’s Apprentice and How to Catch a Killer, she pens a regular blog for Psychology Today. She has also written a fiction series based on a female forensic psychologist, Annie Hunter, who consults on death investigations.