I've only picked through a few of the recently (11/26 docs) and a bit of NG...not quite fully pixelated yet, but, some things that are just bouncin' 'round in my noggin'. Not necessarily anything new...jus giving this more serious consideration than in the past...
Consider...
*Best sourced info regarding the "fight" I've seen to-date is Lee telling Jesse. News reports, IIRC, stated neighbor overhearing, but, I have seen nothing of that in LE docs (yet). I can't wrap my head around Cindy telling Lee that Cindy had her hands around Casey's neck. I CAN wrap my head around Casey telling Lee that Cindy had her hands around Casey's neck. I can envision Casey telling Lee this version about a "fight". I CAN see Cindy accepting Casey's version post-7/15 as-needed.
*I CAN'T envision Casey staying overnight @ G&C's (and certainly not getting tucked in by Cindy) after a "fight" that escalated to the point that is being described. I CAN buy that Casey stayed @ Lee's that night (as her cell pings would be indistinguishable from Lee's) and we are NOT being told of that fact as was agreed by Lee and Cindy (George's stories being adapted to go along w/ Cindy is further supported by today's release) since omitting it, along w/ the choice of 6/9 originally would add emphasis to the conflict 6/15.
*Casey had been prepping the story to friends that G had an affair and G&C were divorcing. The outfall would be Casey assuming ownership & payments of the house, and Amy would be moving in by mid-June. Important to note that some version of this story was told to both circle of friends (Amy & Tony L.)
*Revealed as reported on NG that among other things, "neck breaking" had been searched on the computer.
SPECULATION: Casey attempted to murder Cindy @ the Anthony home upon Cindy's return from the nursing home Sunday 6/15 with the intent of staging it to appear that George had committed the crime since he would be the one that would report it, had financial issues and pending divorce (hearsay) as a motive when he returned from work. If executed successfully the end result would be:
1) Casey free of Cindy completely
2) Casey free of George via imprisonment
3) Casey the benefactor of insurance & assets (including the home)
4) Casey receiving victim-hood status & attention from peers, etc. following a George-killed-Cindy scenario
5) Casey having live-in roomate to provide Caylee-care
Something did not go as planned 6/15 (e.g. chloroform dose insufficient or Cindy successfully defended herself), hence, Casey spun "the fight" story to Lee to quell what Cindy would likely tell him later. Lee may or may not have been at home 6/15PM...perhaps Casey had a key to his house.
Casey may have (a) picked up Caylee from Cindy, taken Caylee to Lee's and sedated her so Casey could return to G&C's to carry out the murder, or (b) Casey may have sedated Caylee after putting her in the Pontiac carseat so Casey could return into the house and carry out the murder, or (c) Caylee may have witnessed the attempted murder. Any one of these three situations could've resulted in Caylee being accidentally overdosed in the act, intentionally overdosed to eliminate witness, or intentionally overdosed out of rage when the murder went awry (iow...if "spitefull b**ch" couldn't murder Cindy she'd do the next best thing...take Caylee away from her.)
Since Casey's lifestyle would've been
positively reinforced if Cindy took custody of Caylee, I have difficulty seeing Cindy's threat for custody as a sufficient motive to exact revenge by murdering Caylee.
I do believe there is a compelling story that Casey's motivations (listed 1,2,3,4 above) drove her attempt to murder Cindy...with the eventual consequence of murdering Caylee.
All, IMHO.