Well, at first I was on the fence. He's the one who saved her life by fishing her out of the water, but he also lied about who pushed her into it. At first I was thinking the rescue is worth some mercy but then I realized he had already had the story of it being an accident right after he pulled her out and was still soaking wet. That means he received the bribe ahead of time that means he also passively watched her get pushed in too. She could have easily have drowned and he only intended to get her body out or go through the motions of rescue to make himself look good. In other words he was an accomplice from the start, not just a guy given hush money after the fact there is a big difference in guilt there.
I also think getting pushed into water shouldn't be more than a prank, not an assassination attempt. However I realized I was looking at it from a modern perspective, and a privileged one at that. I'm from a middle class suburban community, and a coastal one at that, kids play in the ocean every summer, almost all kids received swim lessons before they can even walk. I just take for granted that any 10 year old can swim at least X meters, float and tread water. Being pushed into water over your head with heavy historical clothing on in a society that there's no way they teach swim lessons to little girls, well you are going to drown. I mean I realized now that I only have the instinct to kick off my shoes when falling into deep water because it was drilled into my head when I went on boats in the ocean as a teenager, can't not imagine how much your clothes would drag you down if I was wearing layers of court dress.