Regardless of the outcome here, I think it's high time that cops just start wearing body cameras all the time with legal muscle to back it up so that tapes can not be destroyed. It would resolve much of the confusion in some cases. If Brown was shot from 20 feet away with his hands up, there's zero justification for that shooting regardless of what happened 5 minutes or 5 seconds before. If he was shot 5 feet away in an aggressive pose, then there would be good reason for that. We'd know with a camera.
The city of Rialto did this a couple of years ago. Officers' use of force went down by 60% while public complaints dropped over 80%. Those statistics are staggering.
http://www.policefoundation.org/site...e-of-Force.pdf
I'm not generally big on cameras and "big brother", but I think it's gotten to the point that the only way out is to hold both sides accountable for their actions - criminals and cops - and to do so impartially. The camera doesn't lie.