Not quite the end of the story, sorry.
Put yourself in Officer Wilson's shoes. We don't know for a certainty if he knew Brown and Johnson were the robbers, if he merely suspected they might be, or if he was entirely unaware of the robbery. It seems like that information is still being hashed out and we're getting mixed messages on it. But if he wasn't aware, Brown's reaction to a mere jaywalking stop would've seemed even more bizarre and made him seem even less predictable... furthermore:
You're Officer Wilson, this guy just physically attacked you in your own cruiser and tried to get ahold of your gun in the process. You've never had a perp do anything so brazen and unpredictably violent and volatile before. From your perspective, while you are injured and terrified, do you believe Brown has made an attempt on your life? Yes or no?
Do you know for a fact he's unarmed simply because he hasn't produced a firearm or other weapon of his own thus far?
Do you know for a fact his friend isn't armed with a pistol, and taking aim at you right now from another direction?
Just imagine the terror of a situation like that. Someone has beaten you about the head and nearly got control of your service pistol. As far as you're concerned, you just barely prevented your own demise... there are still two perps, you don't know if they're armed, and you certainly don't consider the situation neutralized yet.
And based on what you do next, millions may be ready to bury you under the prison.
Seem fair?
I'm going to need to see something pretty damning before I grab my pitchfork and join the mob.