OK, I've tryied to think of how Casey could have left with Caylee after a big fight and Caylee just accept to follow, without screaming for her grand mother? I don't think so...
There goes my two cents.....
The Big fight (on june 15) during which CA and GA probably told her they would seek custody of Caylee. Thats where it went wrong....
Casey decided to show them who's the "boss", took Caylee and left (or was thrown out). Caylee was crying, screaming, demanding to go back to gramma's and got on KC's nerves. She could not deal with that. She stopped somewhere remote, got out of the car, let Caylee cry herself to sleep in her car seat or helped her with a little chloroform. (Remember, it was said that Caylee could sleep through anything at friends partys) Now she could think.... She didnt want her parents to get Caylee, even though she wanted the freedom, she knew that they could get custody because she lied, stole, was unemployed, etc. She would find someway to solve this. But not now. She was tired and wanted to sleep. So.....
If she didn't go back to her parents on the 15th to sleep (even if George says she did) she gave Caylee too much chloroform, by accident, to make sure she would not wake up during the time she spent in the trunk. She had to put her in there because people could see her asleep in the car, alone, while she was sleeping with Tony, feeling ''secure''. When she woke up, she went somewhere remote, to take Caylee out and put her in her car seat until she woke up. Only, when she openned the trunk, she realised that Caylee was not breathing. Maybe she acted like a mother, for a little while, cried, took her in her arms even. That is until she thought about what this meant for her. That's when she went on ''survival mode''. I think she put her back in the trunk to pretend nothing happened. Just for a little while... She had to find the story she would stick to. Maybe she bought some ice bags to put around Caylee's body, to make sure it would not smell...and give her more time to think.
She started that day, on the 16th, saying that she left Caylee at Zenaida's .. and so on. But Caylee was in the trunk. She went home on the 18th, backed her car in the garage so nobody would see her take her child out of the trunk. Maybe she was going to try to physically stage a scene. She lays her besides the playhouse, maybe wanting to say she fell, hit her head and died? Or like she went swimming with Caylee and forgot the ladder. Caylee drowned, she takes her out of the pool, lays her besides the pool maybe? Nothing felt plausible. But she did not think of the fact that Caylee's body was already leaving decomposition traces...which the cadaver dog picked up.
So, she took Caylee back to her trunk, went in to change her clothes. She was thinking that nothing could explain her daughter dying. She could not bury her. With the storms and flooding, her body could be unburied and discovered. She had to burn her. She needed gas to do it faster, so less time to get caught. She knew her dad had gas cans but the shed was locked. She borrowed a shovel, broke the lock and took the gas cans. She spent some time in the house, backyard to erase the staging signs, returned the shovel and left.
She found somewhere remote or some park where people can make fires (in a big barril) and cremated her daughter's remains. She used one of the gas cans to make sure there would be no traces and kept the other to make sure she would have enough gas to get back to Tony's, not be stranded there.
All she had to do now, is pretend nothing was wrong....
If she went home on the 15th of June, like George said, well it all happened on the 16th, in the afternoon. Caylee might have fallen asleep in the car seat and she drugged her with chloroform to make it last a little longer.... and so on....
If you don't believe Zanaida took her, which I don't, it has to have gone that way, imo.
Got to go, I'm gonna be sick!