On July 30th, 1975, Jimmy Hoffa vanished without a trace. For 50 years, members of the Hoffa family and Teamsters members have been fighting for answers. Hoffa's son, James P. Hoffa, is even pushing for President Trump to declassify case files.

FOX News Senior Correspondent Eric Shawn discusses the mysterious circumstances of Hoffa's disappearance and sheds new light on the case in his new special, Riddle: The Search For James R. Hoffa.

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