My generalization is not a reflection on your opinion, just an observation. I honestly don't know how you can stop these one offs, though. Almost 3 Million people die a year in the US, a handful of hate crimes are awful and you never can condone them and/or stop trying to rid your society of them; but how do you completely alter protocols to read the minds of the prejudice people you may be hiring?
That’s a tall order. However, putting them in prison for manslaughter or murder when they commit manslaughter or murder would be a good place to start. Rule of Law. When justice isn’t being served against the people who supposedly carry out justice on behalf of the government...at some point you can expect the public backlash to become violent. I really don’t think this should be such a politically divisive issue...most of us agree that this cop needs to be punished, racist or not.