One must remember there are still DS ops in FBI.  Announcements such as this one seem to come from nowhere, and without any correlation to things we do know.  And, let's face it, the press has been less than honest with us.  I do feel this action by DOJ Prosecutors may be closely tied to the 4 who walked off the Stone case yesterday. Then, there's always the outside chance McCabe was role playing all along.    We'll see.