This week, Adam is joined by retired detective, Paul Holes. Paul is best known for being the investigator working alongside Michelle McNamara in the capture of one of California's most notorious serial killers, the Golden State Killer. They take a deep dive into cold cases, the mind of a serial killer, and what led to the capture of the elusive predator. Paul's new book, 'Unmasked: My Life Solving America's Cold Cases' is available now at all major bookstores, and on Amazon.