J.J. Johnson, a pioneer of the modern jazz trombone died Sunday at his home in Indianapolis. He was 77. It was an apparent suicide. Johnson was considered the definitive trombonist of the bebop generation. He played with the Count Basie Orchestra, Benny Carter, Dizzy Gillespie, Wood Herman, and Miles Davis, often balancing that with leading his own band. Later in life, Johnson moved to Hollywood to work as a composer and arranger for television.