The high school I attended (public) was about 70% white, 25% black, and 5% other. There were a lot more crime and behavior issues in my school than in my neighborhood, mostly with the black kids. But, with few exceptions, the black kids all came from poor families and a very poor section of my fairly large hometown.
We had our share of racists in the school, who doesn't? But, mostly, the behavior issues at my school were summed up like this: "!@#$ing poor people." It all comes down to what you see as the impetus behind crime when crime and race and crime and socioeconomic situation are both relationships that are highly correlated. It could be that neither of them are causal, but if you had to pick one that was far less retarded, it would be crime and socioeconomic situation.