John Callahan (outlaw) outlaws of the "Public Enemy"-era such as Edward J. Adams and Pretty Boy Floyd. Floyd may have, in fact, gotten his start in the underworld by transporting bootleg liquor for Callahan before becoming a bank robber. Callahan was eventually convicted of drug smuggling and was sentenced to 25 years imprisonment. He would serve only seven years before his release and retired to Wichita where he died in his sleep on June 8, 1936, at age 70. John Callahan (outlaw) John Callahan (1866 – June 8, 1936) was an American outlaw and bank robber during the closing days of the Old
Pretty Boy Floyd have been Miller's accomplices. Factors weighing against them included their apparent presence in Kansas City at the time, eyewitness identifications (which have been contested), Richetti's fingerprint said to have been recovered from a beer bottle at Miller's hideout, an underworld account naming Floyd and Richetti as the gunmen, and Hoover's firm advocacy of their guilt. Fellow bank robber Alvin Karpis, an acquaintance of Floyd's, claimed that Floyd confessed involvement to him. On the other side of the issue, the bandit alleged to have been Floyd was supposed to have been wounded by a gunshot to the shoulder in the attack,