I was appalled to see the COA overturn his conviction. I believe Hooper was just as guilty as the others by participating in the incident, and I think it sends a terrible message to would-be criminals.
Hooper undoubtedly knew his amigos had guns, had to have known there was a good chance of being confronted by the police and thus should be punished as severely as the others. (Of course, I probably wouldn't be quite as upset if I hadn't been shot at by Nicholson during the manhunt.)
Petition for Discretionary Review. It is the document a prosecutor files, asking the higher court (Court of Criminal Appeals) to reverse the decision of the lower court. It is a very popular document for the Waco court of appeals.