Arturo "Thunder" Gatti hung up his gloves in 2007, closing the book on a boxing career that bordered on the mythical. At long last, he seemed ready to leave the business of blood behind for a long, happy life outside the ring. His retirement was celebrated—boxing's modern gladiator had earned his freedom.Two years later, he was gone—found dead in a hotel in Brazil under mysterious circumstances. He was only thirty-seven years old. Did he commit suicide? Or was he killed by his new ...