AA has committed an unforgivable sin in the world's financial Garden of Eden. It's a rotten apple.
Previously, they could have pleaded incompetence in certifying Enron's financial condition. That might have prevented criminal prosecution of the auditors (or maybe not) but it still would have finished them as a company.
This new revelation changes the presumption to them being crooks without very good judgment.
It's like the famous law school question of whether somebody who jumps out of a skyscraper but is shot as he is falling has been murdered. It's important for a lot of reasons, but the dude is still dead.