Complex sentence: After incapacitating Doug, Lizard continues to pursue Ruby and Catherine, but before Lizard can harm either one of them, Doug brutally beats him with a shotgun, and shoots him multiple times.
Split into simpler sentences: After incapacitating Doug, Lizard continues to pursue Ruby and Catherin. Before Lizard can harm either one of them, Doug brutally beats him with a shotgun, and shoots him multiple times.