I always thought GA was lying about seeing the girls leaving on the 16th at 12:50pm and that it was more likely 12:50am, when he was watching the repeat news after he got off of work at 11:00pm. I have always thought that CA convinced GA that 12:50 am and 12:50 pm weren't so far apart as to make any difference, since it was still 'technically' true because afterall it WAS the 16th at it WAS 12:50. ('not everything I told you is a lie' - Hmmm? Familiar?).
I remember CA stating "I know where SHE was, because I put her to bed".
The news here in Orlando on Ch 9, 6, 2 or FOX does not repeat. It is on at 10 for FOX and 11 for the other 3 and that's it. (Ch 9 used to repeat, but stopped a few years ago)
Personally, I think KC and CA fought earlier in the evening when Cindy got back from the Nursing Home. No doubt Cindy's Mother was talking about KC and the money, how KC couldn't be bothered to visit anymore, things like that. Maybe Caylee told Grandma Cindy what KC did when they were at all the parties. Maybe Cindy opened her trunk and Caylee said something like "My Mommy puts me in her trunk" causing Cindy to pump Caylee for more info.
By the time Cindy gets home, she is fuming and her and KC go to town and it gets ugly. Cindy tries to choke Casey, starts ranting at Casey the things that Caylee told her, and now Casey decides she needs to grab Caylee and does so.
Now she is really mad that Caylee told her Mother Cindy about all the shenanigans and mistreatment of the baby. Casey then takes her rage out on little Caylee. Casey puts the duct tape over her mouth telling her that the tape would keep her from telling Grandma anymore stories.
Caylee dies.
Casey shoves the body in the trunk util she figures out what to do.
She drives over to Sawgrass to visit her friend. Maybe in an effort to creat an alibi as to where she was. Her friend wasn't home but she did happen to see ZFG which causes her to think "Hey I've heard a name like that before"
(meaning the name of the corner neighbor on HopeSpring where the body would eventually be found)
Maybe when the apt manager was showing ZFG the apts, the manager had left the sign in card on the desk. Casey stopped in at the office and spots the card sitting on the desk and notes the name.
As far as Cindys claim that she personally tucked Caylee into bed that night, I don't think that ever happened. Cindy just claimed it did.