Jimmy Hoffa – Wikipedia

James Riddle Hoffa (born February 14, 1913; disappeared July 30, 1975, later declared dead July 30, 1982) was an American labor union leader who served as the President of the International Brotherhood of Teamsters (IBT) union from 1957 until 1971.. From an early age, Hoffa was a union activist and became an important regional figure with the IBT by his mid-20s.

https://en.m.wikipedia.org/wiki/Jimmy_Hoffa