My prediction
She killed Caylee in a total Rage from all the build up with everyone else, the boys, the fight with Cindy, then Caylee did something that pi$$ed Casey off so much, perhaps even during a text or phone call with *someone* and she struck out....
I saw the rage in her on that video.
I am sticking with what I have thought all along She killed caylee in a rage, it was a momentary lapse of complete and utter rage and she struck out. So in her mind she probably feels she hasn't done anything wrong.
I tell you one thing.
I cried during that video

For Cindy. That was PURE and complete Devestation.
The phoney Tear that Casey shed was just that phoney.
True upset and hurt is what Cindy was showing
How totally and utterly sad
Agh !
Cindy - Someone said she died in the pool thats the newest story out there -
Casey > Suprise Suprise
Omg :
George - you are the boss...think of this as a business.... He is APPEALING to Caseys sense of worth, selfishness, center of attention
She is talking over her dad all the time, she is trying to deflect the conversation about what George wants to talk about..switching the conversation....
Can Cindy Hear Casey when George has the phone ?
Just when Casey says something like He's focusing on Caylee and me and You're focusing on Caylee and some of your focus on me , cindy raised her eyebrows !!
Casey - Sit on my butt all day and read or look up stuff for my case - because that HAs to be my focus now > that has to be my focus now
Cindy - your focus has to be Caylee now
Casey Mum If thats my focus which it is I cant do anything from here....
Sigh Ive only got up to 9.53 and have to go for a bit.
Im sure she killed Caylee in a Rage after watching that, and her whole demeanor is wait and watch and see whether the body is found or not (at the time of that interview)
I felt completely compassionate for Cindy during that taped visit. She was totally distraught Genuinely distraught and devastated for her granddaughter AND her daughter