didn’t she drown?
“didnt she drown?”
I have no idea. But people have been convinced to drown by others for centuries. An elderly woman is an easy target.
Having said that. I strongly suspect this is an accident. However, if it’s not, it’s unlikely that NTSB will “discover” anything. An NTSB guy will retire and then later die while cleaning his gun. (That’s a hazard if you get involved in this game.)