It ain’t just d.c. They take advantage of them all over the place by keeping up the “You can’t make without us benevolent white dumbocrats helping y’all out!”
So more blacks were being locked up than whites. Then the black "leaders" said it was racist to arrest more blacks than whites.
One problem that blacks have of their communities getting somewhere is too many of them fall for the sensationalist political talking point of what's best for the "black community" and not enough stay on point to actually get real improvements.