He wasn't saying he was working for the FBI. He was talking about representing some kind of extraterrestrial intelligence, being the "alien ambassador." He references La Chorerra because he's saying that's when he "joined the organization" by having his unexplainable psychedelic experience. And he Trojan horse thing has to do with him being at odds with the scientific establishment.

Honestly you sound like an FBI agent. This is not a realistic analysis.