So how should I have read the agent?
BTW, anybody who would have brought a recorder to a personal hearing in any business I conducted for the government would have found himself engaging in a very long conversation about the weather and their personal hygiene.
Remember, the agents have their own rights, and they are going to protect themselves, not just the government.
No matter what, wear a jacket and tie, carry some 3X5 cards in your coat pocket, take a pen. Best bet is to collect their business cards (they all have them and are collectibles worth something on the market some day). Write down their names on one of your cards ~ get their phone numbers that they are using (which may be different than the ones on the cards). Discover their mailing address. Lots of these "fibbies" and other DOJ people have fake business addresses ~ this is because they really do have enemies who'd like to harm them.
Odds are they will not give you a transcript of your meeting, nor will they sign anything. If you have one of those handy-dandy cellphone cameras, they'll probably request you to check it with the receptionist before even telling you their names. You should request the same courtesy of course!
Now a typical federal agent is going to be carrying a piece with him at the office. Some of them have more than 1 in fact. Most will remove their jackets so you can see their weapon if you wish. I had a meeting with one of them once when he crossed his legs and a couple of guns fell out of his britches ~ he'd just come off a 6 month stake-out and was quite nervous.
No sudden moves!~ I can't emphasize that enough, and if you are hard of hearing, let them know that IMMEDIATELY UPON ENTRY.
I suspect this is going to be one of those "do you recognize this" deals, and it might be a picture, or the internet stuff, or someone you might have done business with. That would be one of the reasons for them to ask you to their office rather than for them to come to your office.
Make sure they arrange for your parking and give you a voucher for your gasoline costs.