Katherine Ramsland has played chess with serial killers, dug up the dead, worked with profilers, and camped out in haunted crime scenes. As a professor of forensic psychology and a death investigation consultant, she's vigilant for unique angles. The author of 71 books, she's been a forensic consultant for CSI, Bones and The Alienist and an executive producer on Murder House Flip and A&E's Confession of a Serial Killer. She's become a go-to expert for the most deviant and bizarre forms of criminal behavior, which offers background for her Nut Cracker Investigations.