What Happened to Jack Adema?

Jack Adema was convicted of more than 50 counts of wire fraud that put him in federal prison for four years during the mid 90s. The FBI demanded to sit down with Jack Adema and then demanded that he tell them who his sources were, which is a pretty reasonable demand given the fact that he's talking about backpack nukes. But Adema refused to give them any concrete information because in his words, he believed the FBI had been penetrated by Russian agents. However, US law enforcement officials began investigating Adema in May 1991, more than a year before he supposedly refused to hand over his Lithuanian sources to the FBI.