In mapping what the two main counter-sniper positions would have seen as they looked toward Crooks, it became apparent that the counter-snipers closer to Crooks probably were unable to see Crooks because a large tree was in the way.Too clever, Crooks! Or did you have help to have learned those subtleties? Hence, neither of the two northerly counter-snipers likely liquidated Crooks.The southerly countersniper position was able to see Crooks AS HE FIRED, but BECAUSE OF THE SLOPE OF THE ROOF (hmmm!), they probably didn't see him until he fired, as Crooks exposed more than his scope's lens.