Given the evidence, how would the prosecutor have argued the case in order to get indictment?
I'm no lawyer, but I watch Law and Order, and I don't see it.
The thing that makes it understandable is looking at what the purpose of grand jury hearings is in the first place.
The grand jury isn't intended to determine guilt. They are just a check, or restraint, on the prosecutor. He is supposed to show them that a crime may have been committed (someone is dead here) and there is some good reason to think that if there was a crime this person would be a good candidate to convict of it.
This system is what keeps my local cops, who despise me, from just picking me up on some totally non existent charge, and making me fight my way through a trial over nothing. My local prosecutor would have to show a grand jury that some sort of crime was at least potentially committed and that in some way shape or form I might have been involved. Without that I could spend the rest of my life in court, being found not guilty of spurious charge after spurious charge after spurious charge.
So, given that as the purpose of the grand jury, we have appropriate rules for the grand jury. There is no defense presented, because that puts a burden on the accused...specifically the burden that the grand jury is supposed to be preventing from falling on people who haven't done anything, when maybe nothing has even been done.
All this prosecutor had to show was that Brown was shot full of holes and Wilson shot him. No question that a crime
may have been committed and that if it was then Wilson is a valid suspect. Beyond that anything else to be decided is decided in a trial.
Now, the prosecutor could just as well have thrown the trial. But throwing a trial without it being really obvious might be tricky. On the other hand, most people really don't get the whole grand jury concept. He showed them all the evidence? Well, that seems fair enough. Why wouldn't he?
He wouldn't because
that is not how the system works. That is also not what he has done in literally thousands of other cases. So what have we got? Clear favoritism displayed by the prosecutor. That's the problem.