More importantly, the government minder is there at all times. Even during the handshake, Garcia is looking at him, not the senator. The body language is clear: he's afraid.
I'm sure he was informed prior to the meeting about what he was expected to say and the consequences for not doing as he's told.
It was apparent to anyone who was paying a lot of attention that he was a narcissist [1] who was willing to lie and break the rules to satisfy his own ambition. There were also subtle indications of this as well.
[1] It apparently no longer exists or is impossible to find now, but prior to the Democratic primary the NY Times did a profile on Adams in his Brooklyn brownstone. It was extravagant, and his comments in the article gave me a strong narcissist vibe. I was already leaning against him, but that pushed me into the "anyone but him" camp. The photo used in the second link is from the photo shoot they did for that article.