FILE - Jimmy Hoffa is shown in this 1975 file photo. Hoffa, father of current Teamsters President James P. Hoffa, disappeared from the parking lot of the Machus Red Fox restaurant in Oakland County's Bloomfield Township in July 1975. Federal agents revived the hunt for the remains of Jimmy Hoffa on Monday June 17, 2013, digging around in a suburban Detroit field where a reputed Mafia captain says the Teamsters boss' body was buried. (AP Photo/Richard Sheinwald)