Eventually, both Bulger and Flemmi were revealed to be FBI informants. Flemmi believed that as a result, he had protection from the FBI, but not immunity. He initially planned to prove through his own testimony and that of others that he was being prosecuted for crimes that were effectively authorized by the FBI. He believed that as a result, Judge Mark L. Wolf would have no choice but to throw out the entire indictment. Flemmi's problem was that he couldn't really come clean. Without immunity, he couldn't admit to killings he hadn't been charged with. By the time Flemmi took the stand, in August 1998, John Martorano had pleaded guilty and started outlining the details of almost twenty murders he'd committed. Many of his murders had been done at the direction of Bulger and Flemmi, who had paid him more than $1 million during his years as a wanted fugitive between 1978 and 1995. To many questions about the murders Flemmi was involved in, he pleaded the Fifth Amendment.