To play devils advocate here regards her going into the river..I'm open minded based on what we know regards how she ended up there ...its very very likely imo she entered the river from the park (no other crime scenes we know of and screams were heard around pond / river area
So if its deemed difficult to run up there if frightened ..how is it any less difficult if
Was forced up there
Was dragged up to it
Was killed and carried up there
I'm also open minded but my opinion in the given circumstances at that crime scene - easier to force or drag. Or carry.
PR is stocky, male, fired up with adrenaline and has shown a level of control and lack of concern before. Libby would be extremely vulnerable, cold, terrified and in shock and slim.
If the river had been straight with easy access paths beside it, steep banks down to it making it as deep at the point of entry as the middle and the fall more preciptous maybe my opinion would be more split between the options.
But this is tidal so depth would be variable both when a person fell in and in the days afterwards. It would take effort to get to it. It meanders - so places to get caught at the sides. I believe people have said it would involve running up a bank. I would have thought ensuring something was closer to the centre of the river would be better.
Wouldn't a less preciptous fall be more of an initial slide gathering momentum leaving traces where vegetation is crushed, even when frozen?
But I'm not a river expert so that is just uninformed opinion.
We had a student tragically drown near here last September. But it was a straight fast, flowing river in the Midlands (not tidal), access concrete paths beside it and a sharp drop into it. Current and depth were equal at the sides and the middle. The fall would have been sharp. He was found two weeks later close to where he was last seen. Libby wasn't.
I can't rule anything out but I think falling in and disappearing would be hard.
That said, whilst I think the park was a crime scene I'm not 100 % on board with it being where she entered the water anyway. It was searched too well.