By the way, for anybody who truly interested in some perspective on race, Isabel Wilkerson's book "Caste" is amazing.
Her basic thesis is that it's not just pointless but counterproductive to try to identify and shame bad apple racists. They aren't the problem. The problem is that our society has long-held, deeply-seated beliefs that are both reflected and propagated by our social systems. I couldn't put the book down, and honestly I don't spend much time reading about social issues.
She doesn't use this particular analogy, but one way of thinking about it is that a lot of the problems with police violence toward black men isn't because the individual cops are "racist" in the traditional sense, but that our society has instilled in them an idea that black men are dangerous. They don't intend to resort to violence more readily with black men, but they are primed to more quickly interpret danger signals. Thus, the solution isn't to root out the blatant racists from our police departments, but to address the sources/causes of this fear. That biased fear is racism, but not the sort that is usually invoked by that word. (Which is why Wilkerson's use of the word "caste" in place of "racism" can be helpful.)