The true story of outlaws Butch Cassidy and the Sundance Kid, whose turn of the last century exploits made headlines, led them to be pursued by Pinkerton detectives hired by the railroads, and inspired the hit 1969 film starring Paul Newman and Robert Redford.The true story of outlaws Butch Cassidy and the Sundance Kid, whose turn of the last century exploits made headlines, led them to be pursued by Pinkerton detectives hired by the railroads, and inspired the hit 1969 film starring Paul Newman and Robert Redford.