Butch Cassidy Butch Cassidy Robert Leroy Parker (April 13, 1866 – November 7, 1908), better known as Butch Cassidy, was a notorious American train robber and bank robber, and the leader of a gang of criminal outlaws known as the "Wild Bunch" in the American Old West. After participating in criminal activity in the United States for more than a decade at the end of the 19th century, the pressures of being pursued by law enforcement, notably by the Pinkerton detective agency, forced Parker to flee the country with an accomplice, Harry Alonzo Longabaugh, known as the "Sundance Kid", and Longabaugh's girlfriend
Butch Cassidy and the Sundance Kid says he wrote the story as an original screenplay because he did not want to do the research to make it authentic as a novel. Goldman later stated: The whole reason I wrote the ... thing, there is that famous line that Scott Fitzgerald wrote, who was one of my heroes, "There are no second acts in American lives." When I read about Cassidy and Longbaugh and the superposse coming after them—that's phenomenal material. They ran to South America and lived there for eight years and that was what thrilled me: they had a second act. They were more legendary