WASHINGTON — A memo filed in federal court for the District of Columbia on Tuesday confirmed that President Trump’s former top national security adviser, Michael Flynn, has been cooperating extensively with special counsel Robert Mueller’s investigation into Russian interference in the 2016 election. The document also revealed that Mueller is working on a separate criminal investigation, but it did not divulge any details about the focus of that probe.
The seven-page sentencing memo was accompanied by a heavily redacted six-page addendum detailing the “significance and usefulness” of Flynn’s assistance. Mueller had requested that the addendum to be partially sealed because it contained what he described as “sensitive information about ongoing investigations.”
Most of the blacked out portions of the addendum dealt with a criminal investigation that the document distinguished from the special counsel’s principal probe into coordination between Russia and the Trump campaign. While Mueller’s documents provided almost no detail about this mysterious investigation, they confirmed it was separate from the Russia probe and that it is continuing.
It is not clear from the documents whether the second investigation involves Trump. ...
The documents filed on Tuesday also provide some hints of where Mueller’s Russia probe is focusing. It said Flynn had “provided firsthand information about the content and context of interactions” between Trump’s presidential transition team “and Russian government officials.”