When the C.I.A. noticed in late 2010 that its spies were disappearing, suspicion did not immediately turn to Mr. Lee, according to current and former officials. But as fears of a mole grew, the government set up a secret task force of C.I.A. officers and F.B.I. agents. A veteran F.B.I. counterintelligence agent, Charles McGonigal, was assigned to run it, former American law enforcement officials said.Lee plead guilty. I have no idea whether he was guilty, but even that NYT article contains quite a lot of expressed doubts.
As the disappearances continued, analysts concluded that Mr. Lee, even though he had been out of the C.I.A. for years, had known the identities of many of the those who had been killed or imprisoned. He showed all the indicators on a government matrix used to identify potential espionage threats, one former official recalled.
Though whether or not he was, McGonigal was certainly in an interesting position!!!
Also, quite obviously, the kinds of people praised for being "institutionalists" (this is a compliment, for some reason) think their jobs are to protect the institutions!