norml.org — BUSTED: Samuel R. Caldwell, 1st Federal Marijuana Prisoner Arrested: Oct. 5, 1937 Sentenced: Oct. 7, 1937, 4 years in Leavenworth Penitentiary for selling 2 joints Sam died of stomach cancer before his sentence was up. Coming Soon! 20,000,000 - The 20-millionth marijuana arrest - 10/10/08