At halftime of that game, referee Walt Anderson had taken some convoluted measurements that came in with a wide range of data, many of them not particularly out of the norm. That's in part because of natural gas law, in part because this could in no way be considered any place for accurate scientific work and in part because Anderson used separate, and wildly different, gauges to take the data.
At that point the NFL should have realized that this case was a loser. Suspicious district attorneys have to do this all the time and just refuse to prosecute. Even if the league thought the Pats were up to something, generally you have to have some kind of decent evidence.
Besides, the NFL had never in its history cared about the inflation level of footballs, even in a league that loves creating rules for all known circumstances. It has no idea how footballs are naturally affected by various weather elements or contact. It never dawned on the league to care until an untimely episode occurred right before the Super Bowl.
A good commissioner, or a good leader of any organization, would have bailed, squashed, protected and vowed to solve the problem going forward. No way this is a scandal in the NBA or even in the old NFL.
Fine the Pats for lack of proper pregame protocol because a guy took the footballs into the bathroom. Then call it case closed.
Instead after a little more than a day of collecting basic evidence and interviews, ESPN coincidentally (or not) ran with a bombshell report that 11 of the 12 Patriots footballs were underinflated by more than two pounds per square inch and, conversely, none of the Indianapolis Colts' measured as such.
It was damning.
It was also completely false.
None of the Patriots footballs were so deflated and only four Colts footballs were even measured, so that didn't matter. Someone at Goodell's office may or may not have leaked it – the league office appears to be the only entity at the time with the info. Even if it didn't, the league, equipped with the truth, failed to either refute it or just pass the info onto the Patriots. The league even fed the Pats similarly frightening, and inaccurate, data.
Essentially, whoever leaked it to ESPN counted on the report being so big that the public would believe it no matter what came out later.
It worked.
ESPN has never retracted it even though the actual stats show it breathlessly ran with bad info. The NFL has declined comment on it. Ted Wells didn't investigate how such a media leak could occur, even though he printed the ball measurements that proved it a lie.
Heck, Wells even decided to not take Anderson's word for which gauge he used on which measurements and instead just decided the ref misremembered.