I have been wondering about the reported argument after they returned from the nursing home. Did Casey see the video of Caylee singing please don't take Nan's sunshine away and that sent her over the edge? And the book found at the scene (well, appears to be the book found at the scene)? Would that not be a spiteful act? Jealousy, etc? Is that why CA originally said June 9th? To deflect from anything and everything having to do with June 15th?
IMO. And yeah, I probably posted this in the wrong place...seeing Caylee and the book and Jesse's revelation of Casey being jealous of Caylee made me think of it.