Justin Cooper is a former Bill Clinton aide who helped Bryan Pagliano manage Clinton’s private server while Clinton was secretary of state.
In September 2016 Congressional testimony, Cooper will reveal that he was interviewed by the FBI three times as part of the FBI’s Clinton email investigation. The first time is in August 2015, the second time is in the fall of 2015, and the third time is in the spring of 2016. He will say he was never offered an immunity deal. (US Congress, 9/13/2016)
Cooper appears to have been the first key play in the Clinton email controversy to have been interviewed by the FBI.