At 2:15 on a Wednesday afternoon, the most powerful union leader in America called his wife from a payphone in a restaurant parking lot. He said, "They stood me up. >> [music] >> I'll be home by 4:00." He hung up the phone. He never [music] made it home. Jimmy Hoffa, 62, former president of the Teamsters, the largest, [music] most powerful union in America. He'd served time for jury tampering. He just gotten out, and he wanted his [music] union back. The men he was supposed to meet at that restaurant were connected to the Mafia. They didn't want him back. His car was found [music] in the parking lot, unlocked, no sign of a struggle. The FBI believes [music] he got into a maroon Mercury around 2:45 and was driven away without a fight. He was never [music] seen again. For 50 years, the FBI has been digging under a football stadium in New Jersey, under a horse farm in Michigan, under a suburban driveway, [music] under the floorboards of a house, under a landfill in Jersey City. They have never [music] found him. Most investigators believe the Mafia killed him that afternoon and destroyed the body so [music] completely it will never be found. But nobody has ever proved it. >> [music] >> Nobody has ever been charged. The restaurant is gone. The payphone is [music] gone. The parking lot is still there. 50 years, nobody, [music] no arrest. He said he'd be home by 4:00. What happened between 2:45 >> [music] >> and 4:00? Like and subscribe Gray File TV. New file every day.