"We" dont do the determining. If there is no clear proof either way then I am ambivalent. For instance a cop could be an upstanding man of the people in his white community. However, when policing Blacks, he is a raging racist cave ape. That guy I would laugh when he was killed. You probably would mourn him. So your little question really has no merit because you dont determine how I judge someone and I could care less how you judge them.
So, by taking that stand, you're actually saying that individuals should judge, not society and that society shouldn't interfere with that judgment. Your opinion seems to be based on race and anarchy. That's sad.
If you really thing about it. Society is not in a position to judge. They cant possibly no the entire story unless they were there. There is a reason the cops play up the good side of officers. Its called swaying public opinion. On the other hand they play up the negative side of anyone they happen to shoot. If you note neither actions have anything to do with what actually occurred. The supposedly "good" cop could have been a racist and shot the supposedly "bad" civilian simply because he wanted to. Thats why video of these events has become so important. Now we see cops on tape doing the things the Black community has long accused them of doing like planting evidence.
Cops that behave that way will plant evidence on anyone they choose to victimize, not just Blacks. Some years ago, a young man I knew was shot and killed in Houston and the policeman put a pistol on the ground beside him. He was a white kid. Had nothing to do with race. And, Society is the only entity that should judge because it's made up of ALL of us and reflects all of our values.
There are bad cops, true, but the war Black Lies Matter is waging now is on ALL peace officers, good and bad.
It is past time to stop quibbling about nuances and stand up for these good public servants.
This never would have happened when I was growing up because people understood the role of police to serve and protect in 99% of America. The use of police to collect government revenues with traffic fines and the seizure of private property has largely changed the perspective of many today, and that is a shame.