My theory on the Shoppers shooting, the Amoco cabbie and the Leisure World victim is the shooter wasn't more than 100 yards out, shooting straight down an "alley". In the cabbie's case, he was standing between his car and the gas pump and was hit in the chest. The vehicles at the pump are pointed at the Giant or the front of the gas station building. The Leisure World victim was sitting and the bullet passed through her head and through the window behind her suggesting straight on shot maybe? And the Shopper's victim was walking away from the store down a row of cars and there isn't more than 150 yards until the line of sight is obscurred by other buildings. All relatively easy for an expert marksman. Could he be something less?
Anyhow, my bed beckons. I'll be back in the morning.
There's a very narrow drive behind the Giant, and a white truck parked there in the sat photo. I believe the grade goes up to the church property and for that reason, there may be a retaining wall as well. Anyway, I think there is a ladder that goes up to the roof behind Giant there.
I can't believe he'd take the time to climb on the roof either, but I saw on the news they were checking it out today.
PS - Leisure world is only 5-10 minutes away. But you probably know that.