From Wikipedia, the free encyclopedia. John D. Voelker (June 19, 1903 –March 19, 1991), better known by his pen name Robert Traver, was an attorney, judge, and writer. He is best known as the author of the novel, Anatomy of a Murder published in 1958. The best-selling novel was turned into an Academy Award nominated film   directed by Otto Preminger and starring Jimmy Stewart   that was released July 1, 1959. Duke Ellington wrote the music for the movie. It is critically acclaimed as one of the best trial movies of all time.