I'm sorry, Dr. Guilmino, I did not mention that family therapy has thus far been of little or no help. The parents are to the point of saying "If you are going to live here, you are going to follow the rules" -- but of course a 14-year-old can hardly be told to leave. Still, the idea that he can simply do pretty much what he pleases, yet enjoy the benefits of being part of a family (such as free food and shelter) is hardly acceptable.
It may be that I (and they) don't really know what questions to ask; but it does seem to have progressed past the point of therapy being able to solve the problem. Unless you know a therapist who is a retired Marine drill sergeant?
"If the parents won't or can't enforce this then he needs to go somewhere that will enforce it."
What could that "somewhere" be? He hasn't committed a crime (yet); are there facilities for "incorrigible" juveniles? I'm not positive that that word fits, but if not it's pretty close...
I am hoping that even the option that this might happen could be a real help in this case.