 While continuing to investigate and hold hearings on other unions and corporations , the McClellan Committee also began to examine the behavior of Jimmy Hoffa and other Teamsters officials . Senator McClellan accused Hoffa of attempting to gain control of the nation 's economy and set himself up as a sort of private government . The Select Committee also accused Hoffa of instigating the creation of the paper locals , and of arranging for a $ 400 @,@ 000 loan to the graft @-@ ridden International <unk> 's Association in a bid to take over that union and gain Teamsters control of the waterfront as well as warehouses . Johnny Dio , who by late summer 1957 was in prison serving time on bribery and conspiracy charges , was paroled by a federal court in order to testify at the Select Committee 's hearings . But in a two @-@ hour appearance before the Select Committee , Dio invoked his Fifth Amendment right against self @-@ incrimination 140 times , and refused to answer any of the committee 's questions . But despite the problems encountered in interrogating Dio , the Select Committee developed additional testimony and evidence alleging widespread corruption in Hoffa @-@ controlled Teamster units was presented in public in August 1957 . The worsening corruption scandal led the AFL @-@ CIO to eject the Teamsters on December 6 , 1957 . 
