I did hear at one time about the "too much water thing" but never followed up on it and then forgot about it.
Thanks for bringing it up.
Although it could have.
There is too much other evidence that would indicate that something else happened, too.
And since we don't know, it should be investigated because foul play could be involved in the orginal incident. And even that doesn't really matter except to bring a possible criminal to justice. They had to right to murder an innocent American lady.