PDA and the criminal justice system

My son is 14 and has recently been arrested for swearing at a police officer, breaking into empty buildings and smashing his ex's phone and glasses. He has been out of school for two terms and has recently been trying to return. This has coincided (no coincidence maybe?) with these most extreme incidents of antisocial behaviour.

The result is bail with a curfew of 6pm (which he is sticking to), a long wait to find out whether they will press charges and meanwhile, compulsory work with the youth offending team, and school deciding that there will be much more compulsion to whatever alternative provision they put in place with no option of going back to school. 

This seems to be pretty intolerable for someone with PDA. But he presents as unremorseful, it's all someone else's fault, he doesn't want any help and please can I just buy him weed to take away the boredom. It makes him pretty hard to love and even harder to help.

 I'm at my wit's end...