Symphony for a Massacre (French: Symphonie pour un massacre), also known as The Corrupt and The Mystifier in English, is a 1963 crime thriller film directed by Jacques Deray and starring Michel Auclair, Claude Dauphin, José Giovanni, Michèle Mercier, Daniela Rocca, Jean Rochefort, Charles Vanel. A French and Italian co-production, it is based on the novel Les Mystifies by Alain Reynaud-Fourton, which was also adapted without credit in India as Johnny Gaddaar. In the film, a criminal plots to betray his partners in a narcotics deal.