somebody wrote a book a few years back about how black people commit most crimes....it was called Krime and the Kolor of Kriminals or something like that....hmmmm.....
here's the thread...
link
anyhoo, I think the phenomena is kind of a definitional thing. When black people want to rob and kill they form gangs, when white people want to rob and kill they form governments. Governments define what is crime and what is not, accordingly gangs commit more crimes than governments by definition.