Before he was caught up in the probe into performance-enhancing drugs in horse racing and arrested for selling and shipping adulterated and misbranding drugs, Scott Robinson was living large. He drove a Lamborghini and his on-line businesses that the government has charged were selling PEDs were pulling in millions. There was never any shortage of customers. "I sold to everybody," said Robinson, who added that he had "thousands of customers," and not just in horse racing. Robinson said his products were bought by individuals using them with camels, racing greyhounds,...