The Newton boys were the most successful bank robbers in American history, up until the savings and loan bandits of the 1980s. Operating in the Roaring '20s, they hit as many as 200 banks and then pulled off the nation's biggest train robbery, a mail train heist in northern Illinois. Despite their remarkable record, they never became as famous as John Dillinger or "Bonnie and Clyde". On the basis of this movie, I suspect it was because they were too respectable.