Gee, recreation centers were supposed to prevent this sort of thing.
In reality, all they do is breed this sort of thing.
Anything which brings young black men together will almost always result in more violent crime than there would have been otherwise. Recreation centers, school, sports programs, even the Police Athletic League — Yes, black crime breeds right under the noses of the cops acting as coaches.
BTW, in case you don’t want to watch the vid, the 15-year old victim is white.