Arthur Shawcross was always a little "off." As a boy, he was unsympathetic and violent, exploding with anger at the slightest provocation. When he was older, fighting in the Vietnam War only intensified his aggressive, unpredictable nature. Arthur returned from service traumatized and harrowed by the experience — but that didn't stop him on his hunt for blood.

Learn more about your ad choices. Visit podcastchoices.com/adchoices