 Colbeck was also suspected of ordering an assassination attempt on his longtime benefactor and associate, Missouri State Senator Michael Kinney, on June 3, 1924.Kinney survived his wounds, and no one was charged in his shooting.On the strength of the testimony of Egan gangster Ray Renard, Colbeck and eight of his men were convicted on November 15, 1924, and sentenced to 25 years in federal prison.