The Dawn Trail (1930)

Dissension arises between cattlemen in Osage County, Texas and sheepherders who have settled there and use the same watering stream. Mart Dalton, son of a wealthy cattleman, quarrels with and kills one of the settlers, thus placing sheriff Larry Williams in a delicate position: he is Mart's best friend and is engaged to Mart's sister June. However, sworn to do his duty, he arrests Mart, incensing the cattlemen, who help Mart escape, leaving Larry wounded.