A couple of things you could do:
-- Make the "committee" provide you with the specific language that details their right to condem the house. IF they're doing this lawfully, they should be following some sort of written guidelines/codes/rules/laws to deem the house fit for demolition.
-- Make sure you have all your paperwork (i.e - deed, proof of ins., copies of power &/or gas bills, etc.) available for the "committee's" review.
-- Since the house is your son's and he's in the military, can you contact JAG to discuss this legal issue? Maybe since it's a house owned by someone in the military, then maybe the "committee" won't have any jurisdicition over the sale &/or demolition of the house. Ask the "committee" if they've contacted JAG since they're aware that the house is owned by a military person.
-- Make a list of all the improvements you've done thusfar. Also, have before & after pics of the house blown up - a picture is worth a thousand words. Exhibits are wonderfully persuasive tools in court.
-- Go see your local housing permit inspector and get his take on your situation - show him the before & after pics of the house. He'll know if any prospective sales or offers to purchase going on as to maybe why they're wanting to condemn the house.
-- If the "committee" is still not satisfied with your presentation at the end of the meeting, make them provide you with a list of items that need to be completed to avoid demolition.
-- Also, what they're doing is called land condemnation. You need to find an attorney who deals specifically with this type of law. Make them aware that there's a military issue involved.
Hope my ramblings help you. Please thank your son for his service and hope his knee gets better. Most of all, good luck on the house!
TaLani