I've never had to deal with worker's comp and hopefully you'll get more responses if you rename this worker's comp. I do know they try to give everyone a hard time, they try to cut you off, thinking you will just accept it. He is going to have to fight them on this or someone on his behalf. I seriously would type this again and name it something that has to do with trouble with your son and trouble with worker's comp. I think you might get more responses from people with the knowledge you need.
Good luck!
Carla