Before you comment, please read the entire article. It's long, it's detailed, and it raises some serious doubts about the NFL's position. From the conclusion,
Because the NFL had little or no experience with measuring psi in the heat (or cold) of a championship game, it is not surprising that the initial readings, from either gauge brought by Walt Anderson, suggested that the Patriots had been cheating. But a careful review of the measurements should have led them to conclude that the entire process of measuring and complying with the psi regulation was much more complicated than had been previously understood. ...
Instead, the NFL decided to tarnish the reputation of a future Hall-of-Famer who some would argue is the greatest player in the history of the NFL. That player is known to even the casual fan as a very intense competitor. I would not be surprised if under the pressure of an impending championship game, he encouraged or allowed staffers to break a rule. It’s a shame that the hard evidence that would make that conclusion definitive is not provided by the Wells Report.