Important to note "cooperating" is used in the NYT story colloquially, it appears. As in, he appeared voluntarily and answered questions. We knew this was happening. Recall McGahn was talking to the SCO a lot around the time of Flynn's plea: https://www.washingtonpost.com/politics/inside-the-secretive-nerve-center-of-the-mueller-investigation/2017/12/02/e6764720-d45f-11e7-b62d-d9345ced896d_story.html?utm_term=.4ce830d5f294 …pic.twitter.com/SDozA5SJoY