Keep insisting that he get into therapy for his emotional states. Even with TBI which is physical, he has to work on reactions etc and better ways to limit those reactions when he is frustrated and overwhelmed...when the TBI responses can be more severe. Tell him to get help or get out? Whatever words you need to say to make him hear. He probably doesn't really realize how serious this is, since he doesn't remember so much of it. PTSD is just as bad and he can be dangerous to you and the children left untreated.

Be strong...and safe.