The Desperadoes (1943)

Popular mailcoach driver Uncle Willie is in fact in league with the town's crooked banker. They plan to have the bank robbed after emptying it, and when Willie's choice for this doesn't show in time, he gets some local boys to do it. When his man does turn up he decides to stick around, as he is pals with the sheriff and also takes a shine to Willie's daughter Allison. This gives the bad men several new problems.