how do you "further investigate" something like that? they've been investigating it for five years already. could there possibly be any other relevant information that they haven't had a chance to review yet?
i think all they're doing is watching janet jackson's nipple over and over again in slow motion. sure, the scene looked exactly the same the first million times you see it. but if you keep watching it, you start seeing other deeper truths. i'm sure that eventually that nipple will break down and start talking.