The Case of the Rhino Slayer part 1 is the first of three Claim, Evidence, Reasoning activities for The Case of the Rhino Slayer. In this lesson activity you begin with the question, Part One, “Who killed the Customs Agent”. You are the lead detective that has been assigned the international crime case which focuses on the illegal wildlife trafficking of endangered animals. Using the clues from the crime scene, determine which of the suspects is guilty. Examine evidence left at the crime scene.