Biologist, wildlife photographer, and tactically trained anti-poaching expert Clayton Porter witnesses what appears to be a routine drug-smuggling flight across the Arizona-Mexico border. Instead, he uncovers a sophisticated operation involving a secret lodge high in the Sierra Madre, canned hunts for endangered jaguars, a ring of opioid-dealing doctors in the U.S., and a string of cartel victims partially consumed by a large predator. After Porter...