Complex sentence: Eddy and Jessie attempt to escape, but Avery kills Jessie and pursues Eddy to the grave site, where they have a gunfight that ends with Avery's death.
Split into simpler sentences: Eddy and Jessie attempt to escape, but Avery kills Jessie. Avery pursues Eddy to the grave site, where they have a gunfight that ends with Avery's death.