This boy has more going on then just behavioural issues. I would strongly suggest that you see if you can find a behavioural specialist and a damn good counselor. I'm afraid your punishment efforts may backfire. I say this from experience.

We all smile in the same language

Have you ever thought of sending him to a boarding school of sorts? Back home... parents at their wits end sent their kids to a place called French Camp. Many kids are sent for behavior your SS expresses and many other reasons. My Step-Father actually went there from age 7 till high school graduation and loved it. If you just want to look into a place like this it's www.frenchcamp.org.

Just a suggestion

I'll tell you right now I have FUN coming up with punishments }:) I pay tribute to my military brat upbringing. Generations of it going back to the Revolutionary War.

Remove the door to his room. Or if he's really acting out--sorry I haven't read your posts so I don't know how bad the situation is but--if his behavior requires severe punishment remove everything out of his room including the bed, dressers, and door. Make him earn them back one by one.

Make him cold food only. Cold/raw meal can be healthy and balanced but not as delightful especially in the middle of winter. Like I said it depends on the severity of the situation. RULE out depression or other psychological disorders and base punishments on what he can handle. You wouldn't want a mental break down to happen. Is he in therapy?