Tyler Bates has revealed in recent interviews with Scorenotes and Billboard that he has written music for the black comedy Killer Joe. The film is directed by William Friedkin (The Exorcist, The French Connection) and stars Matthew McConaughey, Emile Hirsch, Thomas Haden Church, Gina Gershon and Juno Temple. Tracy Letts (Big) wrote the screenplay based on his own play. The movie centers on a family who hires a police detective-turned-hitman to kill their mother for her life insurance policy. Nicolas Chartier (The Hurt Locker) and Scott Einbinder (The Forsaken) are producing.