Jimmy Hoffa He accused senior Nixon Administration figures, including Attorney General John N. Mitchell and White House Special Counsel Charles Colson, of depriving him of his rights by imposing this condition; Mitchell and Colson both denied this. It was probably imposed upon Hoffa as the result of requests from the Teamsters' leadership, although Fitzsimmons also denied this. Hoffa sued to invalidate the non-participation restriction in order to reassert his power over the Teamsters. John Dean, former White House counsel to President Nixon, was among those called upon for depositions in 1974 court proceedings. Dean, who had become famous as a government witness
Jimmy Hoffa caused by the 1975 disappearance of her husband, because her health had declined steadily since then. She is entombed in Michigan. In 1989, Kenneth Walton, the head of the FBI's Detroit office, told "The Detroit News" that he knew what happened to Hoffa. "I'm comfortable I know who did it, but it's never going to be prosecuted because ... we would have to divulge informants, confidential sources." In 2001, the FBI matched DNA from Hoffa's hair—taken from a brush—with a strand of hair found in a 1975 Mercury Marquis Brougham driven by longtime friend Charles "Chuckie" O'Brien on July 30,