To add to this picture, it seems that July 14 was indeed a significant day, besides being the day before Caylee was finally reported missing.
From Valhall's old timeline:
Timeline for July 14 to July 15 2008
[July] 14 - GA starts a new job.
7:35 am CA sends KC a text message that reads "Remember me?"
8:21 am GA attempts to call KC.
2:43 pm to 4:32 pm KC has IM conversation with ID. KC tells ID she is going to get a puppy when she gets her own place.
3:33 pm KC attempts to call Anthony home.
5:30 pm KC makes $15.40 purchase at Blockbuster (7702 University)
5:49 pm attempt to call KC from Anthony home.
8:30 pm CA sends KC a text message that reads "Can u call me soon? i ll b going 2 bed soon."
CA speaks with KC on phone, doesn't recall conversation or what KC's excuse was for not being back in Orlando yet.
10:57 to 11:01 pm KC has IM conversation with ID.
11:33 pm attempt to call KC from Anthony home.
[July] 15 - 12:12 am CA leaves a message on KC's myspace.
http://www.abovetopsecret.com/forum/thread431159/pg1
My guess is that when Cindy and FCA spoke that day, Cindy wanted an explanation about evidence she'd found that someone had been in the house that day. Remember, FCA was supposedly still in J'ville with Caylee, playing family with Jeff Hopkins. FCA must have (surprise surprise) blamed it on GEORGE.
Grandma Cece was starting to get the idea maybe? She decided to call FCA's bluff, letting her know she checked with George, and nope, he was at work all day.
And just a few short hours later, GA arrived at the tow yard and all h*ll broke loose...