The special counsel may reveal more information about the content of Flynn's cooperation at his December 18 sentencing, or he may wait until completing his final report.
The addendum describes Flynn's cooperation here in two buckets: one regarding contacts between "individuals in the Presidential Transition Team and Russian Federation", and a second category that is entirely redacted.
Though prosecutors withheld specific details of Flynn's cooperation because of ongoing investigations, their filing nonetheless illustrates the breadth of information Mueller has obtained from people close to Trump as the president increasingly vents his anger at the probe - and those who cooperate with it. Investigators could ask Comey specifically how the agents who interviewed Flynn characterized his answers and behavior.
Mueller's team credited Flynn with serving 33 years in the U.S. Army, including five years in combat. A highly redacted addendum to the memo said that Flynn had helped the government with several investigations, including the Russian Federation probe, and done 19 interviews with the special counsel's office or other Department of Justice offices.
Flynn began cooperating with the Russian Federation probe "shortly after" Mueller's team approached him, prosecutors said - and that early cooperation boosted investigators' understanding of what happened during the campaign.
Mueller's office has had varied degrees of success with the level of cooperation it has received from defendants who have pleaded guilty. Most notably, Trump former campaign chairman, Paul Manafort, aggressively fought the investigation and is now facing the possibility of a lengthy prison sentence after his cooperation agreement recently fell apart over allegations that he had lied to investigators. They were internet fake ID salesman Richard Pinedo, who is now serving six months in prison in California even after he helped Mueller track down a Russian social media propaganda scheme; George Papadopoulos, who's finishing a two-week prison sentence after he pleaded guilty to lying about his interactions with foreigners while he was a Trump campaign adviser; and Dutch lawyer Alex Van der Zwaan, who served about a month in prison after he lied about his communications following a Ukrainian lobbying project.
"Additionally, the defendant's decision to plead guilty and cooperate likely affected the decisions of related firsthand witnesses to be forthcoming with the (special counsel's office) and cooperate", prosecutors wrote, making clear they used Flynn as their entry point into understanding the campaign and transition. He has instead spent considerable time with his family and worked to position himself for a post-conviction career.
Jonas Olsson: I'd have 'knocked Klopp down' for Merseyside celebration
I'm not sure what the FA has to do in a situation like this but I will have to wait". Marco Silva believes his Liverpool counterpart should not have been punished.
"That most of the details are redacted signals he has given far more than we or the President may know", Schiff said on Twitter.
She claimed that the real crime here is the leaking of Flynn's conversations with Kislyak and the unmasking of Flynn's name by a still-unnamed official in the Obama administration. "I think that is a statement of how Mueller is going to approach the remainder of his investigation as he starts thinking about the people in the White House". In court papers filed along with his plea deal, Flynn said that members of Trump's inner circle, including the president's son-in-law and White House aide Jared Kushner, were involved in, and at times directing, his actions in the weeks before Trump took office. The anticipation was understandable: Unlike some other Mueller targets, Flynn essentially vanished at the time of his plea in December 2017.
Flynn also admitted that later in December 2016 he asked Kislyak not to retaliate in response to the Obama administration sanctions, something he initially told Federal Bureau of Investigation agents he didn't do.
Flynn was forced to resign his post on February 13, 2017, after news reports revealed that Obama administration officials had warned the Trump White House about Flynn's false statements.
Mueller's office says Flynn assisted it "on a range of issues, including interactions between individuals in the Presidential Transition Team and Russian Federation". Flynn was under investigation by the Justice Department for the work when he became national security adviser.
The Obama officials also said they were concerned by reports that Flynn, in a conversation with Vice President Mike Pence, had denied discussing sanctions. He also admitted to making false statements about unregistered foreign agent work he performed for the benefit of the Turkish government.