Special counsel Robert Mueller's office is calling Michael Flynn's cooperation with its investigation "substantial" and is recommending no prison time for the former Trump administration national security adviser.
The Russia investigation is drawing close to a sensational conclusion, with Mr Mueller due to file sentencing recommendations for Cohen, Paul Manafort and Michael Flynn this week.
Mueller, as special counsel, was given the job of probing "any links and/or co-ordination between the Russian government and individuals associated with the campaign of President Donald Trump; and any matters that arose or may arise directly from the investigation". However, his plea agreement states he is eligible for a sentence of zero to six months and can ask the court not to impose a fine.
The court filing provides the first details of Flynn's cooperation with special counsel Robert Mueller's team. Stone has also waged a public campaign against Mueller.
Friends and relatives have said Flynn, who at 2016 campaign rallies led chants of "Lock her up!" about Democratic nominee Hillary Clinton, is eager to face the judge and accept his fate following his dramatic guilty plea nearly exactly one year ago.
Manafort pleaded guilty to conspiracy and obstruction in September and struck a plea deal with prosecutors to answer any and all questions they had about the Russian Federation investigation and any other federal criminal inquiries. He also pleaded guilty in the Mueller investigation to one count of lying to Congress last week, and his lawyers say he expects to cooperate further. That episode is among those under scrutiny by Mueller as he probes whether Trump attempted to obstruct the Russian Federation investigation.
He has instead spent considerable time with his family and worked to position himself for a post-conviction career.
The filing details the series of false statements Flynn made to the Federal Bureau of Investigation and the Justice Department.
He was forced out over revelations that he had discussed lifting United States sanctions on Russia with the Russian ambassador to Washington before Mr Trump took office, and that he lied to the USA vice-president about that conversation.
"The defendant provided firsthand information about the content and context of interactions between the transition team and Russian government officials", it noted. "Such false accusations are contrary to everything I have ever done and stood for", Flynn said in a statement on December 1, 2017.
Other than Flynn and Cohen, Mueller's team charged former Trump campaign foreign policy adviser George Papadopoulos with making false statements to the Federal Bureau of Investigation. Flynn "made multiple false statements, to multiple Department of Justice ("DOJ") entities, on multiple occasions".