Teamster President Jimmy Hoffa makes a personal appearance on Dec. 14, 1964 at a hearing concerning his jury tampering conviction in Tennessee. The investigation into his disappearance in 1975 was recently reignited by a tipster that led police to look for his body under a home in Roseville, Mich., on Sept. 27, 2012.
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A man walks over a rubble field in Jersey City, N.J., Dec. 5,1975. The field was one of the locations where authorities searched for the body of missing former Teamster boss Jimmy Hoffa.
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Law enforcement officials oversee the excavation of a private swimming pool in Hampton Township, Mich., Wednesday, July 16, 2003, where authorities were searching for evidence in the disappearance of Jimmy Hoffa, the ex-Teamsters Union boss missing since 1975.
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The Detroit FBI addresses a news conference outside a horse farm in Milford Township, Mich., where federal agents were digging in search of Jimmy Hoffa on May 18, 2006.
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Law enforcement officials walk down a dirt path to address the media on the search for Jimmy Hoffa's body in Milford Township, Mich., on May 30, 2006.
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FBI officials search for the remains of Jimmy Hoffa on May 28, 2006, in Milford, Mich.
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Police put crime scene tape across the site where a tipster reported to police that the body of Jimmy Hoffa may be buried on September 27, 2012 in Roseville, Mich.
Bill Pugliano/Getty Images
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People photograph the driveway in Roseville, Mich., where police plan to take soil samples from under a home after a tipster said it could be the final resting place of missing Teamsters leader Jimmy Hoffa.