 Paroled in November 1940, Colbeck declared he was going to work as a master plumber and stay out of trouble.Nevertheless, Colbeck and his old associates were rumored to be trying to muscle their way back into the St. Louis underworld.On February 17, 1943, Dint Colbeck was found machine-gunned to death in his car at the corner of Ninth and Destrehan streets in St. Louis.