Complex sentence: He escapes from the cops and vows that he will avenge Goldie's death, killing his way through a chain of small-time thugs before learning the identity of Goldie's killer to be a mute and cannibalistic serial killer named Kevin.
Split into simpler sentences: He escapes from the cops and vows that he will avenge Goldie's death. He kills his way through a chain of small-time thugs to find the people responsible, eventually finding out that Goldie was murdered by a mute, cannibalistic serial killer named Kevin.