Jefferson Morley interviewed on the CIA's Oswald/Joannides files

Morley: I never theorize about what’s in the file, because I don’t know what’s in the file. There’s a bunch of possible explanations, ranging from the fairly innocuous — Joannides might have been basically a bystander who, like a lot of people, had encountered Oswald. That’s a possibility. There are other possibilities, and one is that he was running an authorized covert operation around Oswald that has never been disclosed to this day. That would be much more embarrassing, and maybe even sinister.