That evening after Sullivan phoned in, Costello was thinking that he could use his FBI contacts to get at Billy, costly and messy but effective. But could Billy be more than a lousy informant - even a cop? The more Costello thought about it the more it looked like he had been played; could he find out more and be sure? Costello's only other problem was going to be, was it worth saving Sullivan or sacrificing Barragan if the worst came to the worst when they were put under a microscope.
A month went by and there was no sign from either the FBI or Queenan's surveillance on Costello, that Costello was going after Billy through the Fed's. Neither had the Fed's revealed anything to the SIU about Sullivan, Barrigan or Brown. Not that Billy thought that Brown could be corrupt, quite apart from Billy's gut feelings, Brown was just not the type to get recruited by Costello. But ethnically, and where they were from in Boston, Sullivan and Barrigan definitely were. And how had they both risen so fast in the SIU? Billy suspected that Sullivan could have helped both.
Now back at work, Queenan decided to implement a new ploy ; Billy was going to "leave" the SIU and join the FBI. Well, at least working for the FBI Billy would not be spending (much) time in jail and would have the cash both to rent a secret spare apartment and buy a decent and even more secret out of town home were he could meet up with Queenan. With Billy secretly accessing confidential FBI details, And Costello had no idea what trouble giving info to Connolly and Morris was eventually going to cause him.