Strongly suggest you speak with a qualified personal injury attorney and a workers compensation attorney. Good luck and feel better.

Potentially. However, a qualified attorney would need to know more details. Proceed without delay and good luck.

Sadly, a bad result does not (usually) equate to malpractice. Best to consult with qualified counsel.

Unknown, as many details are missing. For example, your son's present age and his last treatment. Your quesiton also suggests that you have...

Sorry for your loss and thank you for his service. Contact qualified nursing home abuse counsel asap. There are time limitations that are in play.

Cannot answer that question, but can tell you that to get full and fair compensation will (likely) require the retention of qualified counsel.

If your question is, what should be done. Immediately contact your insurance company. If there is a concern about late notice, then speak with...

This may be a classic case of nursing home neglect. Speak with attorneys that handle nursing home litigation. Good luck.

Speaking with qualified/local counsel will help you sort this out. Be mindful of short and exacting filing requirements. Good luck.

Best referral sources are asking those you trust and respect for recommendations, search your states trial lawyers association, or here on Avvo, ...