That's the part of my comment I was least comfortable with, particularly with regards to local / state jurisdictions. A judge, if involved, might request such a dismissal based on the Grand Jury's decision. Or perhaps not.
My point was to clarify (I hoped) the distinction between double jeopardy and jury nullification with Grand Jury dismissal, which ... seems to be a frequently-iterated confusion in comments.
What this isn't is jury nullification, whatever other win it represents for the anti-Flock crowd.