Who killed Jimmy Hoffa? After 44 years, we still don’t know for sure. The new Martin Scorsese film The Irishman presents one possible scenario: that Mob hit man Frank “The Irishman” Sheeran killed the former Teamsters Union president. But experts who have been studying the Hoffa case for decades are skeptical that Sheeran actually pulled the trigger. Veteran journalists Dan Moldea, Eric Shawn and Vince Wade will dissect the Hoffa mystery, separating fact from fiction in pursuit of what really happened on July 30, 1975.