I personally still believe after the details that were released, that it was a suicide staged by Nicola herself to look like an accident. Would we really ever know if it was an accident or suicide tho, because both ways she would've ended up in the water and drowned anyway?
Also I'm sick of people critisising the police's/Peter's search of the river! I'd like to see them do a better job or even go near that river when there could be a body floating around. As I said before, Peter kinda covered himself from every possible angle and it's definitely frustrating that he claimed so confidently that she wasn't in the river just because his team didn't find her. I always figured they'd find her body, but thought maybe she'd been washed out to sea or something. Seemingly it's possible she could have been there the whole time if she got stuck in the reeds. Unfortunately the police or any other search team are going to make mistakes just like the rest of us, we can't expect them to succeed every single time!
Can't imagine what Paul and her family/friends are going through right now. So sad.