An FYI for anyone who was unsure of how many jurors make up a grand jury in Missouri and how many of those members it takes to make a decision. I include myself in that "anyone" because of all the information that has come out of the Ferguson story, I've never seen this question answered. My question was, does the grand jury decision have to be unanimous? If not, what number makes the decision binding?
There are 12 members and it takes 9 to make an official decision or true bill as it is called. They could come back with a no bill meaning no charges or one of two other charges:
Voluntary manslaughter which is knowingly causing death under a sudden passion with adequate cause (an assault on the officer). Or, second degree murder-knowingly causing death.
If a grand jury does not bring charges the federal attorney general could bring charges to a federal grand jury if he decides that an important federal interest was not vindicated by the state prosecution.
So there you have it. The issue I see is that a grand jury looks at all the facts in the case and is not working for one side or the other "to win".