It's all a puzzle isn't it? There are numerous possibilities of what happened re the timing and location of rape and into the water so we'll never know exactly. All we can do is speculate and look at the likelihood of what happened given what we know. I can't at all imagine the rape taking place on the green bit before the park entrance though like PR said. Surely it's way too light there (street lights etc) also it's so exposed - houses nearby where anyone cud have seen them from a window, people out walking maybe. Far too conspicuous for PR to risk it.