This is so interesting to me, because the more and more I think about about chloroform, the more convinced I am that she didn't use it. I'm not trying to discount your opinion at all, because you made some strong points, but here's my thinking on it: From everything I've read, Chloroform doesn't last that long once it's made, I think even the page Casey viewed said two weeks or so, and it has to be stored in a glass container (not metal or plastic). While not hard to make, it is time consuming and methodical (lots of warnings of all the things that go wrong). As a sedative, it wouldn't be that useful because it would require redosing every 15 minutes or so, so I really don't buy into the trunk-babysitter theory. Casey spends much time researching in March, but then never appears to go back to the site on how to make chloroform. She couldn't have made the fatal in dose in March because it would have converted to phosgene gas by June. It doesn't appear that she would have had time to make it on the 16th, meaning she would have had to plan much further in advance, which, to me, is kind of contradicted by the way the body was dumped. Even the idea of her having the patience to make it and store it seems off, she just appears to be more impulsive than that. I could be totally wrong, but these are just my thoughts on the subject.