The above observation leads to the deduction that whoever went into the bathroom at that point (after the stabbing of Meredith) must have had to do so to clean him/herself of Meredith’s blood with which he/she was staining the various things he/she touched or leaned against: the door, the light switch, the mat.
And it is probable - not necessary, but probable - that during the following act of scrubbing the hands to remove the blood, he/she left the mixed trace consisting of Meredith’s blood and of cells which had been removed by rubbing during the act of washing.
An entirely probable outcome given the likelihood of the act of scrubbing, yet not a necessary one, since the running water which was used in the shower stall or in the bidet or in the sink, or in several of these sanitary fittings, might well have rinsed away the washed-up blood and the cells which had been lost during this washing.
At this point, one may turn for the resulting evaluations to the trace specimens found in the sink, in the bidet, on the cotton-bud box, traces which tested positive for human blood and which were attributed to Meredith and to Amanda.
[301] While it is not possible to use the genetic scientific data (Dr. Stefanoni explained the impossibility of determining the date, the succession or the simultaneity in the depositing of the components of the mixed trace specimen and the impossibility of attributing the haematological component to one or the other of the contributors), the information previously put forward provides answers which are entirely consistent with the circumstantial evidence that has emerged and which the Court considers convincing.
Amanda was not wounded; in the days following no one spoke of wounds that she might have had; the examination which was carried out on her when measures restricting her personal freedom were taken ruled out the presence of wounds.
Meredith’s situation was the complete opposite.
In relation to this and to the circumstance by which haematological stains attributable to Meredith were found on the inside of the door, on the toilet-seat cover, on the light switch, it should be deduced that the haematological components found in the sink, in the bidet, on the box of cotton buds were also from Meredith.
Nor can it otherwise be argued for the presence of a drop of Amanda’s blood on the tap of the sink.
This consisted of a spot of coagulated blood, with respect to which Amanda explained that it came from her own ear having been pierced; this spot, furthermore, was located towards the inside of the sink: distinct, separate and morphologically different, therefore, from the trace found in the sink itself.
This Court also considers that the components of the mixed trace specimens were deposited simultaneously, and were deposited by Amanda.
Against this conclusion, the observations with respect to the shared use of the bathroom by the two young women, the resulting likelihood of their biological traces being present, and the way in which these specimens were gathered [by the police], are not valid, in the sense that they are not considered either convincing or plausible, neither in relation to the overall situation present in the bathroom, which has been described, nor with [regard to] the statements made by Gioia Brocci and by Dr. Stefanoni, who both stated that the trace specimens present in the bathroom and in the bidet were of the same colour, as of diluted blood, and appeared to constitute one single trace, one [part] in the bidet and one in the sink. The drop at the top [302] and the drop at the bottom had continuity and formed a continuous pattern.
The specimens were collected accordingly, just like any other specimen which necessarily occupies a certain space, and which the technician does not collect one little spot after another.
It should also be noted that the statements according to which the traces in the sink and in the bidet each constituted a single specimen correspond to the act of cleaning the victim’s blood, an action previously mentioned and during which it would have been easy to leave a mixed sample, constituted precisely of biological material from the victim (blood) and biological material from whoever was cleaning (cells lost during scrubbing/rubbing).
It should further be noted that such mixed trace specimens, with the morphology shown, were found both in the sink and in the bidet.
It should be considered that those in the sink occurred when Amanda, as has been said, washed her hands which were stained with Meredith’s blood; in the bidet it should be considered that they [the traces] originated from a similar activity, but in relation to the feet, which must also have been covered with blood as can be inferred from the print of a bare foot left on the sky-blue mat, stained with Meredith’s blood.
This print will be dealt with subsequently.
Reference to it is made now in order to make the point that the presence of such a print of a bare foot brings one to consider that Amanda (also) could have had bare feet, stained with Meredith’s blood.
The mixed trace specimens found in the sink and in the bidet and on the box of cotton buds therefore signify that Amanda, soiled with Meredith’s blood, entered the bathroom which was right next door to the room in which Meredith had been stabbed; putting her hand against the door she left a mark on it and the dribble of blood which remained is a sign [proof] of this, and left a mark also - still with Meredith’s blood - on the light switch; she touched the cotton-bud box which was on the sink and left a mixed trace specimen of herself and of Meredith; to clean her hands she used the sink in which, through the act of scrubbing, she left her own biological trace mixed with that of Meredith, and used the bidet, most likely to wash her feet, which must have become *blood+ stained in Meredith’s room, where there were widespread and abundant traces of blood even on the floor, and where the blood was spattered over various parts of the room, and also in the bidet [303] she left a trace specimen of what appeared to be diluted blood, which contained both her own DNA and that of Meredith.