scifisam
feck! arse! girls! drink!
I think that a level of racist ideology is so embedded in the minds of the kind of people who tend to become cops in the US that they simply can't get their heads around the idea that it's somehow not OK to shoot a black man. You don't solve that kind of problem with diversity training - you need to go back to their origins. The only way you're going to end up with a non-racist police force is to screen applicants like fuck, and rigorously exclude any who betray signs of even latent racism. It's not that there's a few bad apples - lots of those apples are fine, but the fucking barrel has rotted to bits.
Vox has an interesting article on this subject. What the police really believe
It says that it's partly the nature of the job that encourages not racism, exactly, but acting on that racism. There are probably better parts to pick out, TBH, but I'm tired and wanted to post it before I forgot.