I think she put the duct tape over Caylees mouth and around her head and put her in the trunk "out of her way" to go be with Tony on the 16th. I don't think someone's first choice to keep body fluids from leaking out any further would be to use duct tape. Too up close and horrific for this girl. She'd have to really face what she had done to do this, people like this don't think they are "bad" and refuse to see anything that would show that. I also don't think duct tape would have stuck very well if fluids were leaking out - especially to still have some skin attached to the tape.
I believe she came home the next day and backed in the driveway to get her out of the trunk and found her dead.
I believe she did bury her in a shallow grave in the backyard under the playhouse on the 18th. Decided that wasn't good enough and dug her up on the 20th and put back in the car trunk. This would explain the dirt and maggots in her trunk.
I believe little Caylee was in the trunk still, covered with clothing and other items on the 24th during the confrontation with GA about the gas cans and when she left she immediately and quickly dumped her body in a panic.
I believe that she started telling Amy about the smell the next day to have an excuse for the smell if confronted about it. Unfortunately, the smell continued to get worse and she decided to throw out some of the other stuff in the trunk - hence the "got rid of the smell" comment to Amy on the 27th.
I'm thinking she may have returned to where she dumped little Caylee to leave her other items from the trunk, and saw/smelled what was left of Caylee, was upset / not wanting to face what she had done and abandoned the car and called Tony to "get away from reality". I do think she left her purse there in plain view hoping someone would steal the car which would hopefully leave prints or be able to claim someone else killed Caylee.
Unfortunately, I was involved with someone that I convinced to go for psychological testing a couple of years ago due to my experience and knowledge of them and they were diagnosed as having antisocial personality disorder. Talking with him was way too much like the crazy stuff Casey has been claiming. Reading her interviews is just like conversations I would have with him. Even when faced with the fact of their lies, they just can't admit it. No concern for others, just what they want at any cost. INFURIATING.
One thing I find interesting is I haven't seen anyone mention this yet (might have missed it somewhere), but, if she did tape her mouth shut to leave her in the trunk, prior to death, this would have been done so she couldn't call out and draw attention, right? Meaning she would have still been alive. What would have prevented little Caylee from possibly removing the tape from her mouth when she awoke? I have a feeling her arms were also probably bound and possibly her feet to prevent her from kicking as well. Horrific, but makes a certain amount of sense if these were her reasons for taping her mouth.
In Caseys interview she said that she received a call from Caylee on July 15th at around noon. She said all Caylee wanted to talk about was this book she had been reading and her shoes. Bet the shoes were near the book as well.