The three accused by the FBI of "aiding and abetting" O'Keefe are Stan Dai, Robert Flanagan and Joseph Basel. O'Keefe is 25, and the other three are 24.
Dai's links to the intelligence community appear to be particularly strong. He was a speaker at Georgetown University's Central Intelligence Agency summer school program in June 2009, and is also listed as an Assistant Director at the Intelligence Community Center of Academic Excellence at Trinity in D.C.
The university's president Patricia McGuire told The Associated Press that it promoted careers in intelligence but denied that it trains students to be spies.
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