Well, before you get too sarcastic about teens and their drugs, keep in mind that drug dealers use 12 and 13 year olds to hold their stashes for a reason.
Honestly I'd have to see the video, which isn't going to happen at work, but I know too many cops (both good and bad) to believe that a cop just acted like that for zero reason whatsooever. There is ALWAYS a reason, be it good (cop watched a drug deal), bad (cop hates black kids), justified (cop watched the kid stash a gun), or unjustified (cop knows drug deals happen on that corner occasionally). Even Darren Wilson had a reason for shooting Michael Brown.
As to the Michael Brown thing, there are a ton of discrepencies in the facts of the case. Only the officer saw Brown charge, everyone else saw him take a step. The officer claimed Brown was the strongest person he'd ever seen and was beating the officer severely through the window, yet the ER doctor found no indication of injury. In the photos (taken hours after the incident), the red cheek that was supposed to be major facial trauma not only looked less like an orbital fracture (especially when compared to a real one) than like a hard slap, but was on the right side of the officer's face. Not only was that NOT the side that would have taken a beating from a right-hander, but that's the side of the face that faces inside the car. And yes, witnesses say Brown had his hands up, but one of the autopsies said the gunshots only matched the shirt if his hands were down.
The problem with the Brown case is that the investigation was so slipshod, so haphazard, and so full of procedure violations that it can only be viewed as an intentional whitewash of whatever really happened. It's only made worse by the way the prosecutor did everything humanly possible to convince the grand jury NOT to indict, up to and including pointing them at a 'reasonable force' law that allowed for the shooting of suspects who are running away, when that law was found unconstintutional by the US Supreme Court 30 years ago.
I mean, DEFENSE LAWYERS are calling for the prosecutor to be investigated and disbarred. Think about that.
That said, we're kind of drifting off-topic again. Police stereotyping, malfeasance, and brutality should be its own thread, and if we're going to start talking Michael Brown and its fallout, that NEEDS to be its own thread. Neither really relates to the effectiveness or lack thereof of gun control laws in the US.