Lionsgate has picked up North American and U.K. distrib rights to suspense thriller “Slow Burn,” starring Ray Liotta, LL Cool J and Jolene Blalock.Scribe Wayne Beach (“The Art of War”) penned the screenplay and helmed in his feature directorial debut. Lionsgate will release the film in August. Storyline revolves around a big-city D.A. whose plans to run for mayor are stymied when a beautiful assistant district attorney confesses to a murder, saying it was self-defense. Mekhi Phifer, Taye Diggs and Chiwetel Ejiofor also star. Film, which hit the film fest circuit last year, was produced by GreeneStreet Films, Sidney Kimmel Entertainment and Bonnie Timmermann Prods.