Billy Flynn is a fictional character from the musical Chicago. In the musical, Billy Flynn is a lawyer that can win any trial, mostly being murders done by murderous wives. He has never lost a case in his whole career. In the play, he defends Velma Kelly and Roxie Hart, winning both cases. Most of Billy Flynn's clients actually did commit the murder they are accused of, therefore Billy creates a fictional story like "She was defending herself" or "He was burgling her". Billy shows himself onstage by singing "All I Care About is Love"