He's a very bad liar.
He plays the game of I'm not lying! and then he gets caught and will say Okay, you caught me last time, but I'm not lying this time! and then gets caught lying again and then says Okay, you caught me there, but you have to trust me this time.
Earlier on he basically said he had no knowledge or use for handling footballs and now he's talking about handling balls for science and trying to create an expertise as to why those balls were deflated. He's like the dumb criminal who says 'I don't even have my gun with me!' when the investigators never even mentioned that the victim was shot.
Robert Kraft is just an enabler. To the point where they were set on trying to destroy Matt Walsh's career in SpyGate and they will probably end up intimidating the equipment manager and destroy his career if he speaks out against them.
Classy organization.
YR