Just responded to your other post
on this topic and now that I've read this it makes even more sense.
First things first, get that $500 back and don't accept "no" for an answer from Landmark Education. If it was paid by credit card, then have the cc company reverse the fee. Some of the others here will be able to give better targeted advice for getting your money back from Landmark due to their experience.
I can only guess that it might be worthwhile to give a heads-up to his doctor about the events of late ... just in case there is something that can be given for a temporary morale boost. But also
because it becomes a more credible 'official' record of how he was going and then the effects of the events you describe above. Handy to have, should you discover that you have a case against his boss.
Reply and check back whenever you can. There is always someone on these boards 24/7.
PS. Hang in there!