I was able to locate my mothers car after the accident. Then I had to get POA documents to be able to (first pay the towing and storage fees, then) look at the car. It is completely totalled and unsalvagable. We were both lucky to have survived that freak rollover accident. I plan on buying my mom another car.
On a positive note, my mother got discharged from the hospital today and got transported to her home, and she is able to take off her neck brace.