Was later found guilty of taking bribes?
http://en.wikipedia.org/wiki/Otto_Kerner,_Jr.
Following a 1973 trial in which his prosecutor was future Illinois governor James R. Thompson, Kerner was convicted on 17 counts of bribery, conspiracy, perjury, and related charges.[1] He was sentenced to three years in federal prison in Chicago and fined $50,000. Faced with almost certain impeachment, he resigned his position on the federal bench on July 22, 1974. Kerner was released early from prison when it was determined that he was suffering from terminal cancer.
Oops.