I don't see how a criminal pardon could exempt them from civil liability--after all, the pardon doesn't mean they're not guilty.
So why haven't we seen any civil lawsuits against them? Is it simply because they're all trailer trash and it's not worth it to sue someone whose net worth is $258?
I'd think that with all the massive evidence, it would be easy for anyone hurt in the riot (police, etc.) to win such a suit.