"Third, the investigation established that several individuals affiliated with the Trump Campaign lied to the Office, and to Congress, about their interactions with Russian-affiliated individuals and related matters. Those lies materially impaired the investigation... The Office charged some of those lies as violations of the federal false statements statute. ...Michael Flynn pleaded guilty to lying about his interactions with... Kislyak during the transition period. ... pleaded guilty to lying to investigators about, inter alia, the nature and timing of his interactions with , the professor who told Papadopoulos that the Russians had dirt on candidate Clinton in the form of thousands of emails. Former Trump Organization attorney Michael Cohen pleaded guilty to making false statements to Congress about the Trump Moscow project. ...And ...the U.S. District Court found that Manafort lied to the Office and the grand jury concerning his interactions and communications with about Trump Campaign polling data and a peace plan for Ukraine."
January 1, 1970
https://en.wikiquote.org/wiki/Mueller_Report