I have no firm theory, that is why I asked, but haven't read here any reasonable answer yet.
Funny that. I have read at least three, maybe four honest respectful and reasonable answers. You came here to make a point that the independent experts are somehow unreliable because they reference some obscure police manual. You have received answers that beside these obscure references there are also references from respected solid European sources. You ignore those "more solid" references because you refuse to believe that these defendants had nothing to do with this murder and that there is no real evidence that can link them to it.
I bet you agree with The Machine who recently posted the following...
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"It's worth bearing in mind that Knox's and Sollecito's appeals don't hinge on the knife and bra clasp evidence. There is other crucial forensic evidence such as the mixed blood samples, Sollecito's bloody footprint on the bathmat and the Luminol footprints which isn't being reviewed."
Tell us all here...what do you think of these comments today by Machine?
I think he's nuts personally. There are NO mixed blood samples. I challenge The Machine to show one proof of a mixed blood sample in this case. While there MAY be a mixed DNA sample or two in this case these mixed samples are meaningless due to the expectation of finding ones own DNA in ones OWN home. For example if a murderer rinses his hands in my sink and then the next day I brush my teeth and spit in my own sink it is likely you will find mixed DNA traces. How does that mixed sample implicate me in the murderer's action?
I challenge The Machine to show that the bloody print on the bath mat belongs to RS and not to RG. The experts for the prosecution were shown to be in error when taking measurements. The prosecution expert could not even measure the floor tile correctly, let alone a irregular flowing partial footprint. The final analysis will be that no conclusion can be made about the bath mat print...I will add though that Rudy Guede has admitted in court to being present in this bathroom.
The Machine is wrong when he attributes any meaning at all to the luminol footprints. They have been proven to be tested and found negative for blood. There is no MK DNA in any footprint and further these footprints lead no where and indicate nothing to do with a murder or murderer.
Any other mixed traces are easily explained by contamination due to the unprofessional and not up to standards collection technique used by the various and numerous different police departments allowed on scene to botch up this investigation. That starts with the Perugia phone police up to and including the Rome Scientific police. In between you can add the bumbling of Flying Squads and maybe even Rocky and Bullwinkle.
The guilter thought process is an amazing study in blindness.