You are dealing with several issues and I think only a lawyer can help you with those.
I understand only 25k is available from the other driver ,as far as you know.
But there could be more as has been suggested. So at leas talk to a local lawyer.
Talk to your lawyer and ask him why things happened this way.
Then, if he cannot give you a reasonable explanation, hire another lawyer immediately.
You may need to go outside of Leon County to get a lawyer to help you.
It doesn't sound like there is much else you can do, other than perhaps force the other driver into bankruptcy.
However, there are some insurance issues which could open up the gates for recovery.
Discuss these with your lawyer or perhaps get another opinion.
You should see an elder care/estate planning lawyer in Boston.
A good lawyer will know how to protect your Uncles assets in this situation.
Use the AVVO find la lawyer tab.
I wish you the best in the New Year.