Israel Keyes has been called the most meticulous serial killer in history. He is certainly one of the most chilling. Author Maureen Callahan joins us to talk about this monster.You can find her book on Keyes at Amazon.com: American Predator: The Hunt for the Most Meticulous Serial Killer of the 21st CenturyNote: This is a classic rewind episode from 2019! Look for more all-new episodes coming very soon!Thanks Maureen!Learn more about your ad choices. Visit megaphone.fm/adchoices