Movies like City of God portray pretty well what the consequences of life in modern ghettos likely to be the recruiting grounds for drug traffickers can be, including feral children totting guns, torturing and killing others.

As to the sentencing, well, I figure that realistically he's not going to see the light of day again, you dont pull shit like that without either being a psychopath or messing up your psychological development so bad that you cant ever go back to fully human again.