Most states have laws to discourage capturing and keeping wild animals in order to protect the animals, not the people. Most people are not equipped to keep wild animals, and furry little raccoons, squirrels, rabbits, and deer usually don't handle captivity well.
I know it's not good under normal circumstances, but if the animal can't be released now, and they've been meeting it's needs through difficult care for two years... I say make an exception.