The gang began robbing trains in Arizona, and "Three Fingered Jack" Dunlop quickly became the best known.
They escaped into the Chiricahua Mountains, where they eluded a posse led by Sheriff Scott White and including George Scarborough.
A gunfight began, resulting in Milton shooting buckshot into Dunlop, and wounding gang member Juan Yoas.
Dunlop's wound was serious, as he had been hit by eleven pellets from the shotgun, mostly in the stomach area, whereas Yoas had been shot in the butt.
Dunlop fell from his horse only a few miles from the robbery, and he lay there for fourteen hours before a posse found him.