I'm sure we all know the phrase that a prosecutor could get a grand jury to "indict a ham sandwich". It took prosecutors THREE Grand Juries to finally get an indictment for someone throwing that sandwich.
It's all a complete waste of time and taxpayer funds, and in any other point in history these prosecutors would have been fired immediately for incompetence at even considering an indictment in the first place, not even considering the possibility that they would try for three attempts.