To respond to your question: Chloroform can form in different ways, and one of the experts already showed that some car trunks do test positive for chloroform.
It hasn't been proved yet that Casey is the only one who had access to the Pontiac trunk (basically anyone who could take her keys from her purse at any time, for example, while she's working at Fusian, while she's sleeping, while she's partying, while she's on the computer, anytime, could access her trunk, or maybe she left the car unlocked anyway for all I know). Nor has it been shown yet that she was the only one with access to the computer. One of her friends had a joke about using chloroform on women on his Facebook before KC did her computer search on chloroform, so it's very possible she searched on chloroform because of seeing that. Also, another of her friends got on websleuths here and talked about chloroform being used on military detainees when he was serving overseas. She hung around with this person a lot and could have heard those stories. Regarding decomp, the chemical air test did not say it was definitely of human origin. The cadaver dog hits would be more conclusive if the dogs had picked KC's car out blindly from among a group of cars, for example, a blind test with KC's car and also other players' cars...of course the dog hits would mean a lot more if they had found the body when Suburban was searched with the dogs (though it may mean that the body wasn't actually there yet.) So, so far, it's not conclusive, but of course they may present a lot more conclusive stuff at trial. The fact that she either couldn't or wouldn't provide logical information to the police, and never seemed to understand the seriousness and urgency of Caylee being missing, that's the most bizarre thing to me. It's possible she thought Caylee was with someone safe at that time and wouldn't be hurt, or else she just didn't understand the situation. But it's very incriminating of course. In my opinion
