Frank adopted Y/N. He was furious at billy because in his mind Billy betrayed him and killed his family. Frank drags Billy into enemy fire trying to get some revenge and some answers. Billy was hurt badly. He was bleeding to death with multiple fractures and open wounds and a concussion and Frank left him. In the room however he finds out that Billy didn’t have anything to do with the death if his family. He goes back and try’s to save him.