Article snippet: Special counsel MORE’s one-time national security adviser and campaign surrogate has provided “substantial assistance” in the Russia investigation. Mueller disclosed Flynn’s extensive cooperation in a memo filed late Tuesday that, while heavily redacted in some areas, provides fresh details about the value and breadth of information Flynn has provided to prosecutors in the year since he agreed to plead guilty and cooperate with the special counsel’s investigation. The filing also raises new questions about the status and scope of an investigation that has stretched into its 18th month amid growing attacks from the president and his allies. Here are five takeaways from Mueller’s new disclosure in Flynn’s case. Flynn appears to have given Mueller valuable information It’s impossible to know exactly what Flynn provided to Mueller, but the special counsel said Tuesday that Flynn provided valuable “firsthand” information in the investigation into Russian interference in the 2016 election. Legal analysts say the “firsthand” disclosure is a sign Flynn’s testimony could be key to bringing charges against other individuals should Mueller uncover evidence of criminal wrongdoing. “There are basically two kinds of witnesses. The firsthand witness is the guy who is in the room,” said Elie Honig, a former assistant U.S. attorney for the Southern District of New York.“[Then] there are cooperators who just kind of have second-hand stuff.” According to the memo, Flynn assiste... Link to the full article to read more