Let us assume that is the case. That still misses the point. That complaint is that whenever these events do occur, the deck is stacked in favor of the cops and they rarely receive proper justice in a timely manner.
		
		
	 
First we do not have to “assume” anything. We have statistics and we know facts.
1. None of us should ever accept anyone being mistreated, hurt, or killed unjustly by police. 
2. None of us should ever accept police being “let off the hook” (so to speak) for their own injustices or when they break the law.
However we cannot let what we see on TV determine what statistics or facts are. You say “cops rarely receive proper justice.” Where do you get this information? We certainly know some do not; however we cannot perpetuate “false” or “unknown” information......this leads to a false argument, one that can undermine needed conversation and/or change.
No one should ever be unjustly killed by anyone. This should be of even greater importance with people who have authority over others. We know this does happen; however how can one make their argument or try to create change if they are basing their argument on “misinformation” or wrong information?
We must accept real facts, even if we do not like them. We know some police officers are bad.....there are bad people everywhere. However we also know through tracked statistics people of any race are unlikely to be killed by police. They are even WAY more unlikely to be killed unjustly by police. White males are killed at a higher rate by police than minorities. Unarmed white males are killed at a higher rate by police than minorities. 
Again none of those killed unjustly by police should ever happen; however one cannot gain change without a “sound” argument....one has to have real and valid information in order to have a sound argument. 
Black lives DO matter (although I do not support the blm movement because it is infused with “some” violent and far radical people). Black people deserve to be heard.....and we must all have real conversations using real facts.....not “just” our opinions or our perceptions. 
Many people are hating on police right now. Some rightfully so; however many are using real racism tactics in order to do so......lumping most or even all, in with the very few....this is my point. Facts say most police are not corrupt or bad. Facts say all people are unlikely to be killed by police......we want no one to be unjustly killed by police.....while this may never happen.....we can’t have a legitimate start without having a truthful and sound argument.
Once we have engaged real conversation with real facts, then we can even start to have meaningful conversations about how many black people feel when they are engaged with police (even when those people have done nothing wrong). Both sides need to hear each other. Both sides should also accept facts & opinion “perceived” or not.