EXCLUSIVE: The disappearance of notorious mob boss Jimmy Hoffa is one of the great American mysteries and it has moved a step closer to being solved.The FBI recently descended on a former landfill in Jersey City after a deathbed confession with a man who said he buried Hoffa’s body in a steel barrel.Deadline understands that Ample Entertainment, the production company behind series including Discovery’s Cooper’s Treasure and History’s Lost Gold of WW2, is at the center of the revelations.The company, which is run by filmmakers Ari Mark and Phil Lott, led federal investigators to the site after securing exclusive access to Hoffa expert and journalist Dan Moldea.Moldea has been searching for Hoffa since he vanished from the Machus Red Fox
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