If a Nixon appointee, he was appointed a LONG time ago and is probably senile.
Yes, he retired (accepted senior status) at full salary in 1991. But MANY retired judges come back to work on a part-time basis, like this senile old fool.
If you are curious, look here: http://www.ce9.uscourts.gov/web/OCELibra.nsf/504ca249c786e20f85256284006da7ab/b15667ee1d1bb2d98825682600823373?OpenDocument