Hi Machiavelli, I have the feeling that I am on a list of people you would prefer not to converse with, in part for the correct reason that I am not as knowledgeable as many if not most of the posters here.
Nevertheless, I am hoping to grab a moment of your time. In trying to catch up on the conversation about luminol and TMB I went back to Massei, and was surprised to conclude that if the TMB tests were made at all, they were made after the samples were tested for DNA.
I base this on the following quote from Dr Massei :
Dr. Sarah Gino testified With respect to the Luminol-positive traces found in Romanelli's room, in Knox's room and in the corridor, she stated that by analysing the SAL cards "we learn,in contradiction to what was presented in the technical report deposited by the (257) Scientific Police, and also to what was said in Court, that not only was the Luminol test performed on these traces, but also the generic diagnosis for the presence of blood, using tetramethylbenzidine...and this test...gave a negative result on all the items of evidence from which it was possible to obtain a genetic profile"
Furthermore:
The negative result was also partly a consequence of Dr. Stefanoni's choice to use most of the DNA to determine the individual profiles and only the remainder to attempt to determine the nature of the trace.
An explanation for this is found here:
Speaking of the traces called footprints in the corridor/ rooms: Analysing the quantification data, Dr Gino added, "we see that the quantity of DNA obtained from the major part of these traces is compatible with low copy number DNA; therefore DNA is present in very small quantities.and it did not appear that the analysis had been repeated to validate the results.
This passage says to me that the technical report deposited by the Scientific Police does not mention a TMB test, and Stefanoni''s testimony did not mention a TMB test. Also, the DNA tested was LCN, so small a sample that the test could not be repeated. But to make the best use of this small sample, most of it was used for the DNA analysis, and only a small portion was reserved for TMB analysis.
Perhaps you can correct me, but I do not see how Stefanoni could determine in the field that all the samples would be low copy number, especially as the luminol glowed with such intensity that it was obvious to her it was blood. The technical report makes no mention of the TMB test, and I suggest that's because it was not done.
What I speculate from this is that people with sources, like Vogt and Nadeau and of course Massei himself, are being told in confidence not to worry about the negative TMB, because there never was a TMB test. (It's negative because if it were positive someone might want to see more documentation.)
Is there any proof from the cottage that TMB tests were made there?
Thanks.