What does Billy find when he returns home?

Billy rides the rest of the day, arriving in Cloverdale after midnight. He sees no lights and the dog does not come out to meet him. Billy immediately senses that something is very wrong. He walks into the house and finds no one is home. He goes to his room and lies down, waking at daylight to eat a tin of stewed tomatoes from the pantry. He then rides to the SK Bar ranch where Mr. Sanderson tells Billy about his family. Billy returns to his house and turns over the mattress in his parents' room, finding a large blood stain. The next day he rides to Lordsburg and talks to the sheriff where he learns that his parents' attackers were likely Indians.