Summary: A mother, father and their two children are found murdered in their Wichita, Kansas home. When a group of men falsely confess to the crimes, the real killer directs the police to a letter. He writes about the monster inside of him. The monster who needs to kill. “Maybe you can stop him. I can't. He has already chosen his next victim or victims. I don't know who they are yet. The next day after I read the paper, I will know, but it's too late. Good luck hunting.” In this landmark 100th episode, Jac, Alexis and Billy delve into one of the most twisted serial killers of all time, Denis Rader, who for forty years was known by the initials BTK. Their first degree guest is the killer’s daughter, Kerri Rawson, who had no idea the loving father who raised her was harboring a monster.
