IF this were real life and not a MOVIE, Roger Stone should sue the shit out of the FBI/police and whoever authorized banging on his door in full tactical gear at 6 a.m.
But this is a movie.
Yes. That is the major lesson I learned the first time I was on jury duty. And I've seen cops warn of it since then.
Always get an attorney. Don't say anything to anyone who wants you for "questioning". They are not your friend.