LondonJohn,
The article you cited is even more pertinent now that I have reread it. Dr. Tagliabracci had concerns about the interpretation of the peaks in the bra clasp DNA. Here are three quotations (they do not cover all of his concerns) from the English translation of the Massei report, on pages 241-242:
[Tagliabracci] then turned to the Exhibit 165/B electropherograms (pages 47 and following) and emphasised that, as regards the mixed trace, there are rules which have been issued, some just recently, by the International Society for Forensic Genetics which give recommendations on how the interpretation of a mixture must be done. ‚In particular,‛ the consultant said, ‚they recommend following a different method to the one that was used by Forensics (Polizia Scientifica)‛, who had adopted a suspect-centric method.
Professor Tagliabracci then maintained that this suspect-centric method was detectible in Dr. Stefanoni’s report and presentation because, he affirmed, it was a case of ‚forcing the profile obtained < eliminating or leaving out alleles [257] solely for the purpose of making that profile compatible with Raffaele Sollecito’s profile‛ (page 51).
He pointed out that that there is a significant subjective element in reading the electropherograms. He focused in particular on locus D5S818, in which two principal alleles are present; together with a third peak with a height of 108 RFU; as this is higher than 50 RFU, it should have been considered an allele. Forensics [la Polizia Scientifica] did not, however, consider this to be the case; instead, they considered the 65 RFU peak to be an allele and observed that, in this way, a compatibility with Raffaele Sollecito’s profile resulted, which otherwise would not have been the case (page 59). With reference to this, Professor Tagliabracci repeated that there was a forced interpretation, which was typical of a suspect-centric attitude (page 60).