Sadly there's several cases on here where someone drove into water, and whether it was intentional or accidental, we'll never know. There's several cases of suicide that has shocked sleuthers, and the loved ones' family. The one case, a lady leaving for work, texts or calls a coworker that she rides to work with that she left something, and will see her later. She's found dead in a creek, car parked on the side of the road as if she was there to carpool! Ruled suicide...
In the first thread, knowing both she and the car was missing, my first thought was 'water or ravine' as in many cases that has been the outcome. Don't need a psychic to think that.
Whether her lifestyle or life choices lead to her demise, or whether her mental state lead to those life choices, or whether her mental state lead to her demise, or all truly an accident....we may never know...what came first? The egg or the chicken?