Robert LeRoy Parker (Butch Cassidy)

Butch Cassidy led the Wild Bunch, the most successful train- and bank-robbing outfit of the 1890s, with a reputation — likely exaggerated but not invented from nothing — for avoiding unnecessary killing. Born Robert LeRoy Parker to Mormon homesteaders in Utah, he drifted into rustling and robbery young, serving time in Wyoming's state penitentiary before assembling the Wild Bunch, including his close partner Harry Longabaugh, the Sundance Kid. Pressure from Pinkerton detectives and a hardening railroad security apparatus pushed Cassidy and Longabaugh to flee to South America around 1901, first to Argentina and later Bolivia, where they continued robbing banks and mine payrolls under new identities. Most accounts hold that both men died in a shootout with Bolivian cavalry in San Vicente in 1908, though the lack of confirmed remains has fueled a century of rumors that Cassidy survived and returned to the United States under an assumed name, living quietly into old age.