The 28 year old Ferguson cop who shot Michael Brown to death is utterly typical of all the rural US cops you've ever seen on Sky 1. A working class boy, crap at school except for a a minor talent for hockey, with few alternative prospects except as an unskilled labourer, he opted for the police as a route to social mobility. Despite not being able to write cursive script and the painful necessity of writing everything in clumsy, child-like block capitals in sentences littered with mis-spellings, he was given a badge and a gun and the authority to use them.
His victim was a huge black kid with scant respect for the law, used to using his size to bully and intimidate others. The tiny Korean counterhelp cowering before him as he snatches cigars from the shop give you an idea of the kid's arrogance. The entrenched poverty and disadvantage of being black in Missouri means he has little to lose. As with 15% of Americans, his future probably includes imprisonment in a brutal jail sooner or later.
And Stupid meets Hulk. Only Stupid has a gun. And when Hulk doesn't obey his inflexible, painfully-learned commands, designed to subdue and humiliate large dangerous men so that small cops can safely handle them, Stupid gets frightened and pumps bullets into him. OK, the actual details to be established over the next weeks and months may vary, but this narrative will be essentially accurate.
It's sad, it's wrong and there is no clear blame. It's just the way it is.