re: What do you do when grounding doesn't work?

Does he have any productive hobbies? Does he get enough attention at home? Given that you care about his behavior, it sounds like you're engaged. Personally, I'd be looking for hobbies that are discipline oriented (some sort of sports activity) or get him into welding, wood working, coding or learning to do something that makes money. Kids acknowledge income in a lot of scenarios. Redirect him to those activities and you do it along with him. Learn something together and when he's doing well, encourage him and make the process fun.

Right now he's seemingly attracted to destructive activities, and that is obviously priority one to break. If you haven't already, get the alcohol out of the house. This is one of those times where you're going to have to sacrifice alcohol to keep your boy in line.