317 - The Casanova Killer: Paul John Knowles

For four months in 1974, 28 year-old Paul John Knowles went on a reckless murder spree across the United States that claimed the lives of at least 18 people. He killed men, women, seniors, and small children. He strangled some, shot others, and stabbed still others. Some crimes were sexual, and some weren't. Why did he do it?