I think Casey was at the end of her rope, she was homeless and she was broke and she was as pissed as hell about it, ,,,,,,, after the fight she had w/ Cindy, she left the house w/ Caylee, and was fuming!!,,I think she drugged Caylee so she would be quiet,,then talked to Tony on the phone for awhile (can't remember how long she talked to him that night).
When she finally paid attention to Caylee, she realized she was dead, KC put her into trunk, then took her somewhere around the water treatment plant at 4 am (tell ya why later), and Oh God, removed clothes and maybe tries to burn her but was unable to get rid of her, and put her back in the trunk. at this point Caylee may have started leaking fluid from her mouth, (spot in trunk),,,,,,,,,,,,,,,,,,,,,,,,,,KC lay's low til George goes to work and comes back to house. When she finally gets home, she is secure (flurry of phone calls), she is blaming her mother and her father for her predicament - she does a symbolic Fuck You to Cindy by placing masking tape over the mouth,,saying to Cindy, your nagging led to this, and then took that little body to George's shed and shoved her in a big bag of lime that was kept in the shed - as a symbolic Fuck-up you George,you cared more about your lawn than you did about me so this is your fault,,,then went about her business............ until she came back (neighbor said she backed up to garage 2 x's) and removed her and wrapped her up in garbage bags, sprays w/ pesticides so won't have any bugs or ordor and duck tapes her up until she dumped her for good maybe 27?
I'm sure I'm mistaken on many things w/ senerio, but I think she was giving George and Cindy a message.