The killing of Tara, as filmed, would have been impossible. If you look closely, Tara is standing in front of a brick wall with an iron fence on top of it that comes up to just about her armpits. To push her off, the killer would have had to lift her at least two to three feet to heave her over the fence. But the actual killing scene, filmed from the side, shows a straight shove and Tara falling over something that was at the highest about the top of her thigh.