Agent Connolly was Bulger's and Flemmi's FBI handler, taking the information they supplied about the Italian mafia in Boston. But Connolly went rogue and let the Winter Hill Gang off the hook for their own crimes.
In 2008, Connolly got a 40-year sentence for tipping off Bulger's gang that a businessman was going to inform against them.
Connolly is not expected to testify in Bulger's trial.
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