That will be the most enlightening and important session in the process. Mark my words.
Today’s hearing began with the presentation in court of a letter from Stefanoni’s boss, Piero Angeloni, taking issue with the DNA review and affirming his confidence in the work of his people. It might be said that this tells us little we didn’t expect – after all, it already seemed clear that the police were not going to put up a white flag. Apart from support for Stefanoni, though, I think the real purpose of the letter to highlight how unusual the DNA review undertaken in the case is, in the view of the police. It is unprecedented, says Angeloni, for the police to be subjected to this type of criticism in court.
I wonder if this is a foretaste of a public policy argument the prosecution may seek to hang their hat on. The authors of the review, Stefano Conti and Carla Vecchiotti, start from a position of feeling they need to trawl through academic literature in order to piece together the standards by which they feel Stefanoni should have operated. But, it might be argued, this constitutes them assuming the role of a two-person regulatory body. Even if their recommendations are sound, it is the accepted regulatory framework that matters. The courts cannot permit the police to be subjected to creative criticism that goes beyond this framework because, in that case, the streets would quickly fill with acquitted murderers.
At least, I think that’s where we may be going, and it is also something that is reflected in what Stefanoni recently said to the Observer: “We followed the guidelines of the ENFSI, theirs is just a collage of different international opinions”.
Given what is said the review though, the question that immediately raises itself is how closely the ENFSI or any other guidelines have been followed. I don’t know what the standards required would have been on the relevant date, but it is likely that Stefanoni will need to convince the court that, for example, negative control tests were appropriately carried out on the samples taken from the alleged murder weapon. Arguing that you only need to follow certain agreed standards and then going on to argue that you don’t even need to follow those may be a step too far.
Meanwhile, each side seems to have scored a point in their cross-examination of the experts regarding that alleged murder weapon, a knife recovered by police from Raffaele Sollecito’s flat. The defence were able to elicit an opinion that the blade of the knife had been subjected only to a fairly ordinary wash prior to its discovery by the police. The judges will no doubt be wondering how likely it is that Knox and Sollecito dealt with their murder weapon by giving it only a general clean.
The prosecution, for their part, secured an agreement from Carla Vecchiotti that a six-day gap between the testing of the knife and any prior testing of items containing the DNA of Meredith Kercher would be sufficient to guard against contamination. This may be very helpful to prosecutors, since their main task is to show that the theoretical risks of contamination outlined in the DNA review could not have given rise to any actual contamination.
With respect to the other piece of evidence under consideration, the clasp from Kercher’s bra, said by prosecutors to bear Sollecito’s DNA, the most important answer may turn out to be one that wasn’t given. According to one report, when asked by prosecutor Manuela Comodi how it was possible that Sollecito’s DNA on the clasp could be the result of contamination, the two experts were not able to give any clearer explanation than “anything is possible”. That answer could well turn out to be an Achilles heal for the defence case.