He is 91 years old. He is extremely smart and understands bureaucracy. He has chosen to attempt the difficult, but not impossible finesse of the situation with the “I am one of you, and have nothing to hide” defense.
He may be able to pull it off.
I expect he still has contacts, maybe people that he mentored, in high places.
He has not been charged, and they have not taken most of his stuff. Yet.
I wonder if they plan to "Waco" the guy?
He's in the arena. I believe he's unlikely to prevail, especially without expensive legal help - though if he has some politicians up his sleeve he may escape with light wounds.