https://www.dailykos.com/stories/2017/12/11/1723319/-Did-Trump-direct-Flynn-to-lie-to-the-FBI-and-others-about-his-Russia-contacts-Mueller-wants-to-know
"Keep these four days in mind: Jan. 24: Flynn lies to the FBI about at least two contacts he had with Russia Jan. 25: Acting Attorney General Sally Yates is briefed by FBI agents about Flynn Jan. 26: Yates warns White House counsel Don McGahn that Flynn is in danger of being compromised; McGahn briefs Trump immediately after Jan. 27: Yates and McGahn meet again about Flynn; Trump asks former FBI director James Comey for his loyalty McGahn's actions following his briefing are crucial here because although Yates informed him that Flynn was at risk of being compromised, she testified that she didn't directly divulge to him that Flynn had lied to the FBI because she wasn't at liberty to reveal that information."