He does have some proof he was somehow around some of the claims... Without that phone directory and things published back in the day, it would be much easier dismissed for me.
We have seen educational institutions taint their records in the case of certain politicians and people who either have drank the Kool-Aid or rejected the Kool-Aid. So I don't put a lot of credence into that absence.
We have also seen the government use patsies...