I guess I can kind of see where you are coming from. But the thing is, I'm having a hard time coming up with a type of "accidental death" that Casey would STILL not call authorities, even if she was responsible for negligence (ie. pills in the car).
I keep alcohol in my home, and I tried to imagine if I came home some night and found my toddler had downed a bottle and something happened...I'D BE SO GUILT RIDDEN I'D WANT PUNISHED. So of course I'd tell on myself and call police. If your theory is correct, the fact is that Casey was apparently more consumed with covering up than feeling guilt. And that is just not normal. At all. Mistakes and accidents can happen- but caring, loving parents would feel guilt and want punished. So that leads me to believe one of two theories- either Casey was an unloving parent and killed her child, or she knows exactly where Caylee is and Caylee is alive.
No female, no matter how drunk, drugged, or provocatively dressed they may be, deserves to be ogled, harrassed, raped, or murdered. So stop the ignorant insinuations.