Earlier quoted context omitted.
I'm sure somebody's tried it. But the differences are so large that no amount of statistical trickery is going to be able to make them go away. http://www.infowars.com/black-crime-facts-that-the-white-lib... One must also consider that it isn't the density per se, but the populations. For example, you could compare two equally dense areas but made up of different population groups. You would find a difference.
What is often missed in these statistics is that 90% of the homicides committed by black citizens are committed against black citizens, so it's not surprising that blacks are overrepresented in homicide statistics since they are overrepresented in poor income neighborhoods where all the problems inherent to poverty exacerbate the cycle of violence.
Also, maybe you missed the black on white numbers which are off the charts compared to the inverse.