Justice Dept. stats reveal blacks commit murder at 7 times the rates of whites.
With just 13% of the population, blacks commit about 50% of murders.
And black of white assault is 40 times the rate, of white on black assault.
I think the high black crime rate is cultural, not racial, in its base:
European Murder Rates Compared to the United States: Demographics vs Guns
http://gunwatch.blogspot.com/2013/01/european-murder-rates-compared-to.html
Remove the cultures that do not exist in Europe from the United States homicide rates, and the U.S. homicide rates fall in the middle of European rates.
Using that 13% overall population figure for comparison is misleading itself. A huge portion of the crimes are being committed by a subset of that 13%, specifically young black males. Using 13% makes the problem look less severe than it really is. The ‘usual suspects’ are probably no more than 4% or 5% of the country’s overall population.