Jimmy Hoffa

Head of the International Brotherhood of Teamsters, the then richest union in the world.

He had become a personal enemy of Robert F. Kennedy, who wanted to attack his power and traffics (such as laundering for the Maffia).

Hoffa financed Richard Nixon's 1960 campaign against John F. Kennedy.

Robert F. Kennedy asked one of his assistants, Daniel Moynihan, to lead a discreet investigation to know whether Hoffa was linked to his brother's assassination. Moynihan concluded that the union man was not directly involved in the JFK assassination.