In my humble opinion.....I don't believe any ball boy (or any equipment assistant tasked with the responsibility of maintaining control over game footballs would alter in any way said footballs WITHOUT being told or directed to do so by someone above them in the organization [i.e. equipment manager, one of the coaches, the starting QB, etc.] .
I don't for one second believe that there is a ball boy employed by any one of the 32 NFL teams, has that kind of cachet, to just arbitrarily adjust the air pressure in any of the footballs because he thinks it's a good idea. Especially AFTER they have been screened by the referees. No one with a scintilla of common sense believes that.
If I'm one of two suspended equipment personnel people, they can throw me under the bus publically, as they need a scapegoat (in a case like this, that is understood. Somebody in the organization has got to that the hit). BUT.........if I acted on orders....I'd better be getting my FULL pay (under the table), and them some or......I'm going to the NFL league office in NY, and have a a face to face meeting with the commissioner, and I'm going to sing like a canary.