I am sorry you are having to deal w/him. I'm going to suggest that you stop asking him questions about where he works because that is a thorn in his side and he feels that he doesn't answer to you any longer. He thinks he's above the law and doesn't have to answer to you or the courts about anything. Another thing that I see from your postings, he points out things that you've done or didn't do and you do the same w/him. Nothing is getting accomplished w/this bickering back and forth except that he's probably printing off your remarks or sending them somewhere as evidence. You have choices here: 1) choose to continue this bickering back and forth and nothing gets accomplished; 2) advise him that you will not address those concerns via text, but you will be happy to do so in a meeting at a mutual public place; or 3) these discussions can be held in a mediator's office, preferably one that settles disputes over child custody issues. The more you argue w/him the more he's going to want to prove that he's right. You are fueling his fire by doing this. He gets his jollies by bullying you...take that away from him.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.