It’s still early evening, but for Shaver it’s obviously too late. Shaver arrived per O’Keefe’s instructions to watch for Striper, but Striper was perhaps already here and lying in ambush. Obviously, they fought. Obviously, Shaver was not the victor or the pair would still be present. That presumption adds to O’Keefe’s awareness that he has made the serious error of underestimating his quarry, the time Striper would need to track him down. He will not make that mistake again. Next time it could mean his life.