Doesn't matter, he has a pardon from former President Reagan.
I'm pretty certain pardons narrowly cover a specific possible crime. He wasn't pardoned for Watergate. I mean, if it turned out he killed someone and buried them in a shallow grave in 1972, the Reagan pardon wouldn't help him.
But again, the idea that this guy would be prosecuted is silly. Even if he wasn't senile.
Reagan pardoned him for the wiretap on the anti-war groups
Not for being deep throat