Possibly a figure crouching behind the pillar appearing to be wearing something navy blue? I think this is a viable clue as to BG's whereabouts before he catches up with the girls. I haven't taken much stock in finding people or cars, etc., in every picture. But honestly, I do see this one and, if it were me, I might be tempted to call LE. Chances are their experts would have scrutinized every pixel of every picture for clues but, you never know. If this were to turn out to be BG then there might be evidence of his being there at that spot that could help to identify him.