Maybe you didn't read my post about Michael Brown, because it was buried in a pretty long post, and my daughter tells me nobody reads anything long. Anyway, what I said, essentially, was that an ADA with about half an hour's experience can get a murder indictment against a moldy prune if she really wants to get it. Whatever ADA did the Garner grand jury, pretty clearly, didn't want an indictment.
Reverend Al says District Attorney's offices are too closely tied to police departments. Well, Reverend Al is right, this time, and a lot of other times too. He's not always right, but he's a hell of a lot better than a stopped clock.