Code of the Outlaw (1942)

After a payroll robbery the Mesquiteers catch up with the gang. But the members escape, the gang leader is killed, and they end up with only the leader's young son, who is quickly sent to a work farm. They adopt the boy, hoping to learn where the money is. Just as their kindness is about to pay off, a gang member takes the boy away, forcing him to retrieve the money.