Who is Judge Alva Keyes from The Concrete Blonde and what is their importance?

Judge Keyes is a big man, who wears the judicial robe well. He has a big barrel chest, and large forearms with big hands that give the impression of power. He has a balding, sun-colored head that seems almost perfectly round. His remaining hair is gray, and he has the overall demeanor of a man who is full of legal knowledge and perspective. Appointed to the bench by Jimmy Carter, Judge Keyes has held court as a guardian of civil rights in court room number four ever since. His demeanor in the courtroom is all professional, and his guidelines with attorneys are rigid.