I don't buy the argument that rich black kids commit crimes at higher rates. White and black people smoke weed at roughly the same rates, yet black people are far, far, far more likely to be prosecuted for it.
It's not an argument, merely an unknown. Considering that black people have elements of their own culture that are anti-hard work ("acting white") and pro-crime ("gangsta rap"), I wouldn't be suprised if this culture managed to spoil even the kids from the good homes to some degree.
BTW how do you know that white and black people smoke weed at roughly the same rates?
If you look, Figures 21 and 22 show usage rates to be about the same. However, if you look down at Figure 10, you'll see a huge disparity in arrest rates.