It smelled like Caylee's dead body, it's not her car and she has no respect for her parent's stuff, and she hoped someone would steal it so she could say a carjacker killed Caylee, or maybe she would skip town and let the folks think someone killed her and Caylee for the car. Then it got towed and she had to use her back-up story: Zanny the nanny stole her baby Caylee.
Those are just my thoughts. I'm sure there are plenty of other theories as well.
Susan
Well, I do realize she has no respect for her parents or their stuff. The thing that has me somewhat baffled is this: so often in cases where someone has had a body in the car, you hear that they tried to clean the damning evidence up. They take the car to the car wash, they clean it inside and out, etc. Granted, they're rarely successful at getting all the trace evidence, but it does seem like there's usually an attempt to clean it up.
Casey, on the other hand, seems to have just walked away from the car and left it filled with evidence, with no attempt whatsoever to clean it up. I don't understand that. Even as utterly illogical as she is, that seems like a ridiculous thing to do. I can make no sense of it. Maybe she IS just that dumb, but I'd think that if she were truly stupid like that, she'd just have kept the "damn car" and cleaned it up and kept driving it. Why abandon it unless you are trying to hide something, but if you ARE trying to hide something, why leave the car in that condition? So confusing.
It's a good theory that she hoped it would be stolen, but that would make more sense to me if she'd left it unlocked with the keys inside. I haven't seen any information that she did that. Just leaving it in a parking lot doesn't naturally lead to its being stolen. A tow was fairly predictable.
I am wondering if SHE planned to report the car stolen, so that when it was discovered in that parking lot she'd be able to point to the thief as the killer of her daughter. Maybe she thought she could pull that off, and then found out she couldn't report it stolen because she wasn't the titled owner.
Just a thought.