SAO PAULO, Brazil — In one murder after another, the "Canal Livre" crime TV show had an uncanny knack for being first on the scene, gathering graphic footage of the victim. Too uncanny, say police, who are investigating the show's host, state legislator Wallace Souza, on suspicion of commissioning at least five of the murders to boost his ratings and prove his claim that Brazil's Amazon region is awash in violent crime. Police also have accused Souza of drug trafficking. "The order to execute always came from the legislator and his son, who then alerted the TV crews to get...