I doubt that Maxwell is going to say anything to endanger her pardon - and I think the people who will be questioning her will make sure they do it before she gets the pardon.

Even when he gets his comeuppance, his lawyers are going to say either (or both) that he is too ill to stand trial, or he is not mentally competent to stand trial - and it will have to be a court trial, because there is no point in impeachment when a two-thirds majority in the Senate is required for conviction.