Ok, here's my 2 cents.
I agree Cindy has seemed to be medicated during most appearances and way over-medicated on many occasions. Does that hammer-in-hand episode seem like a normal stress reaction to anyone? Geez.
I would bet Xanax or something of that family. Maybe Atavan, who knows? Lee, too, seemed unusually cotton-mouthed and had a flat, spacey affect after the first few interviews, early on in this drama, in my opinion.
I think Casey just might be Zanny. She was, after all, the nanny, wasn't she? Wasn't Cindy the Mommy, Casey the care-taker, nanny? Casey sure would be a likely candidate, in my mind's eye, for taking Xanax, atavan,... whatever it is that would be readily available in the medicine cabinet. People in general don't remember her drinking or doing drugs until fairly recently, so she just might have been doing the Xanax thing since she broke-up with Jesse and began caring for Caylee. How else could she maintain that vacant, on-cue smile, even while puking her guts out? Now that I think about it, it wouldn't take too much alcohol to get sick if taking those kinds of drugs. Hmm.
Casey is a psychopathic predator in my mind; I don't know if she started drugging Caylee, unless it was random, ambivalent experiments in killing her starting sometime late spring. Wasn't she fantasizing about a windfall, going to PR, coming into $15,000, buying her folks house,... about that time? All she needed for that miserable scam to work would be to kill Caylee, right? As far as I can tell, her rotten thought process was kill Caylee, party, shop, rip off Amy for awhile until the bucks started rolling in, party, shop, become a celebrity missing tot-mom, shop,sell her story/create a blog, go on TV, get donations, insurance settlement, licensing /interview fees coming in, shop... this was Casey's gamble in the game of overnight sensations. Caylee's life was all she had to bet. I think Casey's still betting she will come out ahead in the long run.
Thank goodness she never had to clean up a mess in her whole life. Caylee may never have been found.
About the chloroform, I sure hope some forensic specialist can clue us in on that, and that we get some solid leads from the Toxicology studies. I'm inclined to believe that she did poison that poor little tiny girl, if only because I abhor having to think of her torturing her even more brutally.
I hate her. It's hard to get inside the head of a monster, isn't it?