>But you can go to prison for lying to an FBI agent, in your own home
> >or office, unsworn.
>
> >John
>
> What's the penalty for an FBI agent if they lie to you?
Nada. In fact, it's a condoned interrogation technique. E.g., bluffing, "Don't deny it, we know you did--your buddy told us. So why don't you just come clean, admit it, and tell us the rest..."
Admissions thereby gleaned are fully admissible.
Cheers, James Arthur