Earlier quoted context omitted.
How many cities in the US have police who "murder unarmed black men" regularly to begin with? Of course if that number is small, then the number of cities who regularly convict them will be small. You can't take the small number of cities that regularly convict as evidence of a problem.
Well-documented cases of cops murdering unarmed black men and not being convicted have occurred all over the United States. This isn't a Baltimore problem, it's a US problem.
2. My claim was that there are not many cities with a trend of cops murdering unarmed black men, so your comment isn't a valid rebuttal, however true it may otherwise be.