Unfortunately, the charge is deflation, not reliability. Even if you think it makes him an unreliable witness, they still don't have the goods. Favre was fined for a failure to turn over an existing phone.
They've got bupkus.
The experts retained by Wells did not even account for the time/temperature effects while measuring the balls inside at halftime. After declaring temperature the most significant factor in changes with pressure under the circumstances, they avoided analyzing that effect when looking at the halftime results.
So its impossible on available evidence to determine if the Colts balls exhibited different loss of pressure characteristics that the Patriots. 3 of the 4 Colts balls were below the legal limit. The evidence of the various pressures seems to support an effort by the Patriots to ensure they were absolutely as close to 12.5 as possible. Even if the 90 second bathroom break is nefarious, it still doesn't link to Brady. And the pressure results don't indicate an absolute intent to get distinctly below 12.5