Still it'd be interesting. As a teenager I lived in a suburb of a city with a fairly large black population, the suburb of which had a still fairly high, but much lower number of blacks. I went to high school with a fair number of them, and as far as I know, not a single black person in my class ever so much as committed a misdemeanor much less gun crime.

At this point, I want to say that high black population density is the cause of crime, and its the presence of white people (such as in suburbs) that suppresses crime in otherwise diverse neighborhoods. In Texas, where I live, much like the rest of the South, you also have the phenomena of majority black rural towns with populations of 3,000 or less. These towns also have a pretty high crime rate, though obviously it is far lower than the urban black crime rate. As far as I'm aware, the concept of the "black rural town" is completely alien to yankees.