I agree about if it were a cop car. Id suggest cameras but I doubt the city would be motivated enough to install them considering the lack of revenue potential of catching teens in the projects.
This is straight up assult with a deadly weapon and could easily have been manslaughter.
The only reason they wont look for the offender is because No one in that "neighborhood" will talk to them.
I'm sure the kids that did it, however, will end up in prison for something else unrelated.