Some cops are good, some are bad.
Some blacks are good, some are bad.
Some ppl are good, some are bad.
In Murica, most of the cops need better training, and better screening to weed out the racists.
Murica needs less guns, so cops aren't so scared of civilians, so they don't need to defend themselves from death every second of their life.
Murica needs a better education system, that teaches ppl not to be racist. More science and reason, less creationism. Go to church or private school for that.
Murica needs less Faux news, less radical right wing media constantly telling ppl to be racist hateful bigots.
Murica needs a better job market, so poverty isn't so common. Poverty creates criminals.
Murica has LOTS of problems, with simple (not easy) solutions; but too many republicans who are hard-core Nazi KKK racist homophobic maniacs.
The biggest problem is white, racist, republicans who will never let go of their guns or hate or bigotry.
And if Trump gets into power, this tiny little shooting will become a massive daily civil war, with many, many more murders than even murica sees today.