"10.10 Whilst it might be arguable that the recent DNA tests do not establish that the source of the female DNA was blood, the Commission believes, as a matter of probability, that it is from blood because it was found deep within the silencer. Given the record of handling of the silencer by the scientists, the Commission does not believe that any possible contamination from them is likely to have been found that far down inside. Also, given that it is an accepted fact that blood was in the silencer in 1985, the Commission considers that it is much more likely that the DNA is from the blood found in the silencer at the time. Considering the length of time that has past and the fact that much of the blood was swabbed out for blood grouping, the Commission does not consider that the negative KM result strengthens the possibility that the DNA does not originate from blood. In any event, the Commission considers that the absence of Sheila Caffell's DNA is significant.