beating   convenience store   serial killer   police corruption   call girl   dismemberment   gore   aquarium   hammer   impotence   golf club   based on true story   one day   interrogation   pimp   disappearance   social commentary   antihero   tragic ending   police protection failure   bludgeoned to death   ex cop   chisel   disgraced cop   seoul   murder   brutality   foot chase   one word title   violence   severed head   race against time   victim