When we think of jury duty, we normally envision the kinds we've seen in the news or on TV dramas - complete with a judge who ensures fairness and two opposing lawyers who present their case. What we need to remember about a grand jury is that, first of all, there is no judge present. Secondly, there is no adversarial process. Only the prosecutor gets to present evidence. Witnesses are not even allowed to have their lawyer present.
Under those circumstances, in the dozens of cases I heard, the grand jury never once questioned the prosecutor or failed to provide him/her with the subpoenas or indictments s/he asked for...unanimously. If you'd like to hear how that process affected the Darren Wilson grand jury, watch this video.
No True Bill from Stlfilmmaker on Vimeo.
If your aim was to ensure that Darren Wilson never faced trial on criminal charges (he's very likely to still face civil charges), a grand jury presided over by Robert McCulloch was the perfect venue. The prosecutor's office is making a big deal about the fact that they shared all the evidence with the grand jury (which the lawyers in the video above point out is highly unusual). But that means the members of the jury had to sort through it all on their own - including 4 hours of testimony from Darren Wilson - with no adversarial process to highlight an opposing position.
Of course people are outraged. This is not a process that produces justice!