The Disappearance of Jimmy Hoffa
It's not entirely unlikely that someone like Jimmy Hoffa—an infamous labor leader and Teamster president who went to prison for a litany of unsavory reasons—would be murdered. Despite this, Hoffa's body was never found. The only evidence of Hoffa's murder was a strand of hair that matched his DNA in the backseat of a car. Even his own daughter said, "It would be a comfort to find his body, but I don't think we will."