James Riddle Hoffa

Hoffa, James Riddle (1913–75?), U.S. labor leader, president of the International Brotherhood of Teamsters from 1957. After an investigation (led by U.S. attorney general Robert F. Kennedy) into his underworld links, Hoffa was convicted in 1964 of tampering with a jury over a bribery charge and jailed from 1968 to 1971, when Richard M. Nixon commuted his sentence. In 1975 he disappeared mysteriously and is thought to have been murdered.

See also: Labor movement.