This is untrue.AK left Geude's faeces there because she knew it was his and not hers. The pair made a point of dragging Napoleoni back out of her car, as she was leaving the cottage, to have a look at it. What they didn't realise is that there is too much bacteria in faeces for it to be particularly useful for DNA recovery. But the forensic police did manage to link it to Guede, who never denied it, anyway.
Unfortunately, there was no forensic sign of RG in Filomena's room but there WAS a damning mix of DNA of AK and Mez.
This was via blood which scientists could identify by the high RFU's, as only blood reacts in that way
Please provide reference.
This 2019 article says that stains have to be tested for blood. It does not say that a high DNA return can be assumed to be blood.
A NOVEL METHOD FOR BLOOD DETECTION USING FLUORESCENT DYE
Detection of the body fluid present at a crime scene is essential for any forensic investigation. Amongst all the body fluids (sweat, semen, vaginal fluid, saliva, etc.,) blood is the most frequently encountered evidence at the crime scene. Currently, reagents like benzidine, orthotoluidine...
If this was true, you would be faced with the unsurmountable problem with the knife. The blade which should have had plenty of blood on it only returned a trace amount of DNA (and had not detectable blood) of Kercher. But returned 'normal' amounts of Knox DNA on the handle. Any cleaning that would have removed the copious DNA and all traces of blood from the knife would also have removed all traces of DNA of the welder. Therefore one can conclude that Knox's DNA could only have been applied after cleaning, and since the knife was lying in a draw and had probably been handled by Knox it has no probative value against Knox.
In reality the only (slim) evidence is against Solicito. The bra clasp, the bloody footprint (which is very dubious), the knife (very dubious). The discredited shoe print that Italian forensics incorrectly said was compatible with his trainer (which shows how generally reliable Italian forensics should be assumed to be).
