Mancusi v. DeForte devoted much of their attention to the International Brotherhood of Teamsters (IBT), where Jimmy Hoffa had been allegedly working with organized crime figures to unseat Dave Beck as union head. It feared that if Hoffa led the Teamsters, the union would have enough power to disrupt the U.S. economy. The committee had focused on some of the paper locals Hoffa had purportedly created to stack votes in his favor during the leadership election. The officers of one, Local 266 in Manhattan, were nominally attempting to organize juke box and coin-operated game servicemen in the New York metropolitan area. District attorneys
Jimmy Hoffa assaulted. The threats from the mafia that they would get rid of Hoffa were taken very seriously; Hoffa's son is quoted as saying "Dad was pushing so hard to get back in office, I was increasingly afraid that the mob would do something about it." There had been three visits in a short time frame to Hoffa's home at Lake Orion and one trip to the Guardian Building law offices by Anthony Giacalone, an alleged kingpin in the Detroit Mafia, and his younger brother, Vito. Friendly with Provenzano and believed to be related to him, their avowed purpose in coming