Of course black on black crime is pervasive and awful.
But what does that have to do with the issue at hand???
We are talking about a case where a human being shot another human being, the cops know who the killer is, but let him walk.
Allan, how many cases of black on black murders do you know where the cops had the killer, the killer simply says “I was defending myself,” and the cop goes, “good job, you can go home.”