:banghead:
I swore to give up posting in this thread, but seeing today's post using the FBI's testimony as a reason for not trusting the chloroform evidence was like red cape/bull for me. Those who have read this before, feel free to skip. Those who use the FBI testimony to ignore Dr. Vass, please read and even verify for yourself by watching the testimony *and* redirects by JA.
Dr. Rickenbach was obviously very uncomfortable testifying about amounts based on his qualitative studies, and I believe JB picked up on that during his deposition so he crafted his questions for trial very carefully in order to take advantage of it. Thus all the qualitative vs quantitative smoke screen during the trial and the phrasing of his questions. OK, so he was uncomfortable estimating quantities, but when pressed by JA to estimate amounts relative to his positive control (of 100ppm) in the sealed sample, he said
about 5%or about 5ppm, which was what Dr. Vass found. Once again,
Dr. Vass, did not only do air testing of the carpet sample. He testified that he also tested it using the same techniques that the FBI used with the only difference being that he actually used a more sensitive method of extraction (cryotrapping) , but both showed much higher levels than should have been there. Chloroform in decomp is normally seen in parts per trillion, this one was parts per million.
JB used very specific language to make it seem that Dr. R. was saying the levels were low but that was low as compared to his control sample (of 100ppm). Every single time JB asked him about levels, he qualified the question with "as compared to the positive control". The transcript of JA's redirect & clarification (from
http://www.wftv.com/video/28158552/index.html):
Please don't wave that red cape anymore. I'm even boring myself at this point, but I keep thinking one of you will read it who use the FBI guy's testimony as a reason to not believe these experts. :banghead: