Man, 16 and on probation for a robbery conviction... That's part of the problem, when you commit a crime as a juvenile you get a slap on the wrist and that sends out the message that it's OK to act like an animal.
There's a reality show, I think it's called "Bronx Justice," or something like that. It's about the main court house here in The Bronx. Every time I watch it some judge is letting some 16 or 17 year old off from a serious offense (robbery, assault with a deadly weapon, etc...) with the excuse that he's still young and has still time to get his life right.
Then at the end of the show they report how he was arrested two more times later that year for assult.