Mike was and is Donald Trump’s “buddy” (to the extent that Trump has any friendships which he does not later dump). On December 1, 2017, Flynn “flipped” and copped a plea of guilty to a charge of perjury.
Flynn was Trump’s National Security Advisor and a key member of Trump’s inner circle. He is a crook and is now in the clutches of the FBI. Who will he incriminate? Donald, Jr.? Jared Kushner? We will soon know.