Recently I was watching a murder documentary type video on youtube and I had a question. The case involved a woman and her husband boating out on a lake. She ended up drugging him I believe and pushing him into the water. His body washed up around a month after. At one point in the video the narrator said something like “the medical examiner found that all metabolic activity ended before the body entered the water”. How is this determined, and is it accurate? thanks!