The best thing to do is politely tell them you want to speak to a lawyer. It’s best to keep your mouth shut. It doesn’t matter if you’re innocent because they will try to trick you into saying something you didn’t intend to say. Then they will use what you said against you.
“It’s best to keep your mouth shut. It doesn’t matter if you’re innocent because they will try to trick you into saying something you didn’t intend to say.”
It’s worse than that. Now if you “lie” to a Fed, I mean ANY Fed, you are going away. That is why Martha Stewart went to prison. They categorize the slightest inaccuracy as a “lie”. You said it was a Tuesday, but it was a Wednesday. You tell the same story twice with the slightest change as normal humans do... and now you lied.
You should never speak to the FBI or any Fed at all, never, not even casually.
And with Police, it should be exceedingly rare and crystal clear that you are not a target. If you saw the car fly off the freeway overpass maybe....