Indeed. But that doesn't really matter in the eyes of the law, he's no longer a minor. If he had been a bit more clever he would have stopped doing any of that the day he turned 18.
How you are going to legally come up with money is the question and there are no real shortcuts there other than to get lucky. But with his skills properly applied he would have a much better chance at a nice life than he has today. Money doesn't really matter much if you're in a jail cell.