Oh, I don't know. During a bit of unpleasantness in the early 1990s, I arrived at my office one day and there were two FBI agents with guns sitting on a couch across from desk who wanted to talk to me.
Just a friendly chat.
Eighteen months, two proffers, four lawyers, use immunity from a Federal judge and a grand jury later, I never saw the inside of an FBI office, much less a bare light bulb hanging from a wire in a windowless room.
“Just a friendly chat.”
Fascinating story! The fact that there were two is especially dangerous. The way it works is, one asks the questions and the other takes notes. When they get back they type up the official record. There is no appeal to that official record. If they got it wrong you either lied to a federal agent then, or you are lying now by saying something different than what is in the official record. I would have told them I was happy to speak with them after I got a lawyer. Sounds like you were lucky.
The friendly chat approach is how they nailed Martha Stuart.