The Devil I Knew Unmasking a Serial Killer

"The Devil I Knew: Unmasking a Serial Killer" is a true crime novel of a fifteen-year investigation by former FBI Special Agent Jonny Grusing into the murders of Scott Kimball. Kimball was an FBI informant in the early 2000s who was reporting on murder-for-hire cases while he was secretly making people disappear. Working closely with the FBI's profiling unit, a local detective, and state and federal prosecutors, Agent Grusing was the primary FBI investigator assigned to determine what happened to the missing people, prove homicide cases against Kimball, and ultimately find where he had hidden them. The book delves into the principles Agent Grusing learned from the profilers, and how he applied those tactics as he was talking to this highly intelligent, manipulative murderer. The story accounts for the body recovery trips, extensive conversations with victim families, the other unsolved murders possibly tied to Kimball, and the complete devastation this wolf in sheep's clothing left behind him.