shuttlt and RoseMontague,
From Massei, about page 243: "Regarding locus D7S820, he revealed that Forensics had interpreted it, recognizing the presence of two alleles, 8 and 11; they had not taken into consideration a peak, low, but still higher than 50 RFU, corresponding to allele 10."
Amanda is homozygous at this locus, and not for the 10 allele. To whom does it belong? One can say with 100% certainty that Amanda's complete profile is not on the bra clasp. Beyond that, it is harder to say. One might claim on the basis of some alleles that coincide with Amanda's (possibly at the D21S11 locus), that Amanda's DNA is present, but I think that would be a major mischaracterization.
In locus D16S539, Dr. Tagliabracci believes that there is a peak at the 13 locus, and this also fails to match Amanda's profile. BTW, Raffaele's putative DNA on the clasp is very weak, less than 200 pg according to his appeal.