Back to Deflategate, same article as Bossman's attractive avatar points to, a reminder about the specific complaint forwarded to the League Office about deflated footballs.

"It is well known around the league that after the Patriots game balls are checked by the officials and brought out for game usage, the ball boys for the Patriots will let out some air with a ball needle because their quarterback likes a smaller football so he can grip it better."
Even the original complaint said this happened after the balls were delivered to the field under the auspices of the refs. So what was the explanation offered by the dude in the bathroom with 12 footballs? It seems highly unlikely it had happened before, because the refs would notice. But what was he doing in there?