Wilbur Underhill-the "Tri-State Terror"-is the Boogeyman of Depression-era outlaws in more ways than one. For nearly a decade in the turbulent period of the 1920s and 30s, he was one of the most infamous and feared criminals in the Southwest. Convicted of one of his murders in Oklahoma he was sentenced to life and escaped, killing a cop and receiving another life term in Kansas, and then escaped again, leading ten others in a mass breakout. In the last months of his life, he rose to national notoriety as a prolific bank robber and suspect in the infamous Kansas City Massacre and became the first criminal ever shot down by agents of that fledgling agency which would soon become the FBI.