*snipped*
Enjoying your posts, Bev.
Some random thoughts/comments:
1) I found it interesting that one of Casey's friends having recently served in the military casually mentioned that they commonly use chloroform to subdue unruly prisoners. Subsequent posters w/ military background commented on items leaving base, eh, unauthorized, quite frequently FWIW. Another in her circle posted a satirical pic on his myspace suggesting the use of chloroform to sedate your date.
2) In addition to considering a chloroform connection to Casey's seizure, Amy experienced an episode of waking up in different pants than she went to sleep in at approx. the same time $400 in cash disappeared and Casey was sleeping over.
c) IIRC, reading general info...dosage in the neighborhood of 4 drops is sufficient to sedate an adult.
d) Noodling on the scenario that Casey obtained chloroform w/ ill-intent and had 'excess' to dispose of after-the-fact, w/ a s.g. of ~1.5, if she dumped it down a drain at the house there would likely still be trace evidence in a p-trap, eh? If she poured it/spilled it in the yard by the pool in the process of staging the scene, perhaps that was the compelling reason for digging up some soil vs. temporary burial. Shovel may have had 2 purposes 6/18. Move the body from the trunk into plastic bags w/o touching it, and, digging up some soil to get rid of evidence. Trace of chloroform on the shovel would be telling.
Just some rambling thoughts.