NEW: Mueller's office says former national security adviser Mike Flynn's cooperation with its Russia investigation is "complete." (But he could still testify in a case filed in Virginia against his business partner.)

NEW: Mueller's office says former national security adviser Mike Flynn's cooperation with its Russia investigation is "complete."

(But he could still testify in a case filed in Virginia against his business partner.) pic.twitter.com/62lKPvO5vU

— Brad Heath (@bradheath) March 13, 2019