Judith Epstein Buchanan was Tom Hagen's mistress.
Judy Buchanan was from a wealthy family in New York. She had drifted after college and sometimes worked for an advertising agency in New York. Some time after this she was married to a man who beat her and she became a blackjack dealer.
She met Tom Hagen at a political fundraiser and they began an affair that lasted for years. She had a disabled son named Philip, whose welfare was supported by Tom. Tom also "remedied" the situation of her abusive husband.
In the early sixties, Judy became paranoid that she was going to be killed, and had Tom supply her with weapons. Tom sent his associate Ritchie Nobilio, an arms enthusiast, who provided her with a small sidearm. However, Judy was soon killed in a struggle with Detective Robert Dantzler and his brother-in-law Vernon Rougatis, who had been hired to take compromising photos that would damage Hagen's reputation.