Incident at Elk Horn

When bounty hunter Gustavus Greeley rides into Elk Horn, he learns that Marshal Detmeyer has failed to return from investigating a shooting at the nearby Baker farm. Riding out to the farm, Greeley finds Mr and Mrs Baker and their son dead, Detmeyer badly wounded, and their two daughters missing. Arrows have been used, and the girls are presumed to be captives of the Apaches - but are they really responsible? Or are brothers David and Will Preston, newcomers to Elk Horn looking for land to take up ranching, somehow involved?