Complex sentence: Batzig and the Coia brothers then pummeled Sweeney, primarily on his head and face, with a hatchet, a hammer and a rock until he was dead and stole the $500 cash he earned from work.
Split into simpler sentences: Batzig and the Coia brothers then pummeled Sweeney, primarily on his head and face, with a hatchet, a hammer and a rock until he was dead. They then stole the $500 cash he earned from work.