CNN —A 21-year-old Massachusetts Air National Guardsman has been identified by The New York Times as the leader of an online gaming chat group where a trove of classified documents was posted. CNN has not independently verified the identity of the chat leader or the FBI’s interest in talking with him. While there’s a large number of people who had access to the documents, investigators have been able to home in on a small number for closer scrutiny thanks to the forensic trail left by the person who posted the documents. On Wednesday, the Washington Post reported that the person behind the leak worked on a military base and posted sensitive national security secrets in an online group of acquaintances. The Pentagon has begun to limit who across the government receives its highly classified daily intelligence briefs following a major leak of classified information discovered last week.

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