Huge respect to the Moderators.
My feeling is that she ended up in the water as the result of an accident. I hope the search teams find her so that, as sad as it is, she can at least go home, and there can be some degree of closure for the family.
But for some reason, I am not optimistic. This reminds me a little of the Corrie McKeague case, in which the landfill he should have been found in was searched extensively and yet his remains were not located. Which settles nothing and leaves everyone involved in an agonising state of not knowing for sure.