James Riddle Hoffa (February 14, 1913 – disappeared July
30, 1975; declared presumed dead July 30, 1982)

On the morning of July 31, 1975, James Riddle Hoffa, one of
the most influential American labor leaders of the 20th century, 
was officially reported missing after he failed to return home
the previous night. Though he is popularly believed to have
been the victim of a Mafia hit, conclusive evidence was never
found and Hoffa’s fate remains a mystery.