James Riddle Hoffa was an American labor union leader who served as the president of the International Brotherhood of Teamsters from 1957 until 1971. From an early age, Hoffa was a union activist, and he became an important regional figure with the IBT by his mid-twenties
Hoffa disappeared on July 30, 1975 after he had gone out to the meeting with Provenzano and Giacalone. The meeting was due to take place at 2:00 p.m. at the Machus Red Fox restaurant in Bloomfield Township, a Detroit suburb.
Hoffa was declared legally dead in 1982. Federal investigators believe mob bosses had Hoffa killed to prevent him from regaining the union presidency, but they never found enough evidence to charge anyone.