The large storeat the bottom is a Giant Food, I believe the post office is toward the middle if not just beyond the middle going away from the Giant.
The grade rises about 10-12 feet from the storefronts up to the road (Georgia Ave.) and there is a golf course community across the street.
The victim was sitting on a bench facing the parking lot. I can't see the shooter taking the shot from beyond the parking lot. She's under an overhang, sitting down (below standard car roof level) The police would have to just look up the closest row to find the spot where the shot was fired.