Vixen
Penultimate Amazing
This is seriously incorrect on more than one front. One, Stefanoni did TMB testing also, but she was less than forthcoming about it. This is actually standard procedure (following up a luminescent test with a colorimetric one), a point that I have documented many times in these threads and elsewhere.
Two, TMB is not a true confirmatory test for blood in the way that the HemaTrace test for hemoglobin and the RSID test for glycophorin are. It is only when one gets a positive result from a confirmatory test that one can conclude that blood is present. If one reads the relevant portion of the Conti Vecchiotti report, one finds that a species-specific test was performed on the knife (there was also a similar or identical test performed on Rep. 199 if I am not mistaken). The species-specific test is probably a confirmatory blood test, but more information would be needed to pin this down with certainty. I have several blog entries on this general subject.
I defer to your superior expertise, Chris. However. Did not Conti Vecchitti claim for the defense, the other untested sample on exhibit 36 was "rye starch" or similar.
Another scientific lab tested it, as ordered by Nencini, and it turned out to be...Amanda's DNA.
So much for the Conti Vecchiotti claim "you can't test LCN DNA, as it can't be duplicated."

