I was originally thinking Casey's room, the bathroom, and the car, but something I read here, from Bond, I think, (I will find this info and edit post) is making me wonder about Lee's apartment. I am wondering when, in June, Lee was out of town. I also wondered if he had a roommate around the time Caylee was murdered, but I asked that on the questions and answers thread. One clue I was using for the heck of it, was noticing Lee did not leave any feedback for anyone on a well known auction site from June 12 until June 21. And then again, no feedback left by Lee from June 21 until July 5. Sure this doesn't prove anything, but it's helpful to just suppose.
Did KC have a key to Lee's apartment? It has already been established that Lee shops on that auction site quite a bit, so if he didn't have a roommate to collect his mail/packages daily, he sure doesn't want his auction purchases left somewhere where another tenant could steal them, so perhaps KC had a key (could this be the key that Lee said he destroyed?) and told him she'd take his packages in anytime he was away (Lee, knowing KC prefers to steal cash, not the small, collectible figures he is interested in). I know I am not being specific in how I think it happened, but I am so very curious about Lee's apartment (he has since moved out of).
Also, I am feeling *in my gut* that the dirt road near where the remains were found, that lonely creepy dirt road, seen in GSJ's video (the road where she finally gets out of the car to actually do some searching) was a secluded area KC used to prepare the body for dumping or was this where she actually killed Caylee? KC knew the area so well. She does what's easy, familiar, convenient. There is just something about that road that creeps me out to no end. So from the A's house, to Lee's house, murder Caylee at Lee's or on the grassy road near the dumping site, shove the baby in the trunk, and after that, use Lee's apartment when no one is home, to clean up any messes, dispose of anything that needed to be gotten rid of, wash clothes, ponder about next move, search the net, etc. A neutral spot.