Justin Sane, born Jason Robert Murphy, is an American guitarist, singer, and songwriter, best known as the lead vocalist and guitarist of the punk rock band Anti-Flag. Sane has been passionate about music since his childhood and began forming bands in his teenage years. His musical career began in the 1990s, and Anti-Flag has gradually become a leading figure in the American punk rock scene. Sane's musical style is characterized by his radical lyrics and powerful live performances.