I believe Casey did get into a fight with her mother on Father's day. The next day or that night, I suspect Casey read some emails from Cynthia to friends or family saying Cynthia will pursue a custody battle with Casey. Casey, unemployed, and retarded, knew there would be a chance of losing Caylee to her mom so she intentionally killed Caylee on the 16th of june. It was quick, and she made sure she didnt hesitate around those 4pm phone calls because she probably would have changed her mind if she hesitated. Once Caylee was dead, I believe Casey did not bury her right away, but instead she put Caylee in the trunk. I think Casey drove around with Caylee in the trunk for 2 days without any bags, and she ended up burying her on the 17th when she borrowed the shovel because the vehicle began to smell. Within the next couple days, she probably removed Caylee by hand from the backyard because she realized it would be too obvious to borrow a shovel again and that was a mistake in the first place. She then bagged Caylee up, but placed the duct tape over her mouth because she probably had to witness bugs crawling of caylees mouth when she dug her back up. The duct tape was to keep out any insects that were coming out of Caylee and probably making Casey sick. I believe she dumped Caylee in the wooded area sometime late at night pretty much right where she was found. what a biotch.