I wrote my theory almost three years ago and since reading all the doc dumps and the trial started, my theory hasn't changed much.
I tried doing a search for my original but there were pages and pages to go through so I will just shorten it a bit and post it again.
Think of Casey's rage in the jailhouse vids.
Think of anyone you know, or a movie you've see where the rage/anger is so uncontrollable that the person doesn't even realize what they are doing until the damage is done.
Think of Casey.....this rage didn't just start, it's not new.
This is the life of the Anthony's.....walking on eggshells for years so as not to get Casey in her 'rage mode'.
Big fight over the stolen money the night before after Cindy spent time oooh'ing and awe'ing great-gramps and Caylee video.
A person with the type of rage Casey has, does not forget, carries a grudge. How dare her mother be angry for a few bucks missing.
That grudge, that anger at Cindy, at the world for messing up her (Casey's ) life had plenty of time to fester overnight.
Monday, Casey and Caylee leave the house (or don't. depending on if you believe George saw them that morning or not).
Casey still enraged, grudge/anger building.
All she wants to do is get back to the house once she knows George has left for work so she can text/computer/call her 'friends' to vent about her crazy mother.
George leaves. Casey and Caylee return home.
Caylee wants to swim.
Casey wants to ignore the 'snot-nosed brat' and play on her computer and cell phone.
Caylee won't give up and keeps asking and asking.
Casey gets even more irritated.
Casey tells Caylee if she takes a nap they will go swimming when Caylee wakes.
Casey puts Caylee on her little bed for a nap......removing her shoes.
Caylee, as lots of little ones do, gets up repeatedly, doesn't want to nap, bothers her mother who is very engrossed on the computer and cell phone.
After the fourth, maybe fifth time that Caylee gets out of bed and 'bothers' Casey, the rage begins.
Screaming: "I told you to stay in bed!
Maybe yanking Caylee by the arm back to the bed, Casey picks her up and throws her on the bed.
By this time Caylee is crying, screaming, blood curdling screaming.......scared, hurt.
Casey storms to the garage, gets the duct tape.
Shuts up the screaming.
You have to have seen real rage to understand and see in your mind how this can happen and how quickly it can all happen.
Caylee is finally quiet, not screaming. Being perfectly still on the bed where she was taped up.
Casey wipes her brow, probably a little sweat, exhausted from her rage and actions, goes back to her seat at the computer and proceeds to use computer and cell phone like nothing has happened.
Time passes quickly and it's too late by the time she realizes she hasn't heard a peep from Caylee.
What happens next or in any particular order is unclear but this is what I've theoried (? lol) in my mind:
The borrowed shovel: Could have tried using it as a pry bar to lift stone floor tiles from inside the playhouse.
Or, to pry up the sandbox.....using the shovel as a way to 'lift' the sandbox and maybe pivot the sandbox around.
The dogs alerting:
The decomp smell was bad. Maybe Casey thought rinsing off some things would get rid of the smell.
Plastic toys of Caylee's, sippy cup maybe......some things that could be rinsed off with a hose where thrown on the grass in the back yard and sprayed down with water.
This would leave the decomp scent wherever those things were placed while being sprayed down.
Again, Shoes. There were no shoes found with Caylee.
Don't think Casey didn't realizes this AFTER she dumped that baby in the swamp.
Reason? Telling LE that she got a call from Caylee. Caylee said "Hi Mommy!" and then immediately went into telling Casey about her shoes.
Don't think Caylee's shoes weren't on Casey's mind by this time.
OK, that's it and has pretty much stayed the same all this time.
And Yes, I DO feel that Casey's plan was to do in her own parents but the anger from the night before took precedence.
Do in the parents, same with Caylee. Hide Caylee's body and then go into "Help me find my Baby that was taken the night my parents were killed!" mode. Thus, the Missing Children search on the computer.