Once again, you're deflecting.
In discussing Rep:177 found in Filomena's room, you said;
"This was via blood which scientists could identify by the high RFU's, as only blood reacts in that way."
You were arguing they knew it was blood because of high RFU counts. Of course, it's already been proven this wouldn't prove blood even if the RFU counts were high, but in this case the values were very low. So rather than concede you were wrong, you try moving the goal posts, and now it's
"geneticists can differentiate between DNA from epithelial cells, saliva and other bodily fluids, such as blood.".
Unfortunately for you, as pointed out by others, this too is false. All DNA cells from an individual are identical. Blood DNA looks exactly like saliva DNA. So no, they could not determine it was blood due to the DNA either.
You probably should have just stuck to the PGP line that because Luminol lit up it was blood. This is what led Stefanoni to believe the sample contained blood. It had nothing to do with the DNA found. And, of course, the negative TMB result shoots that argument down.
And BTW, saliva actually has a fairly high concentration of DNA, most of which comes from white blood cells, so your entire premise is bogus no matter how you slice it. **
** From the DNAGenotek website: It might surprise you to know that much confusion surrounds the real source of genomic DNA in saliva. Surprisingly, most people assume the source of DNA in saliva is strictly buccal epithelial cells. However, studies show that up to 74% of the DNA in saliva comes from white blood cells which are an excellent source of large amounts of high quality genomic DNA. Yielding virtually the same amount of DNA per volume and the same DNA quality as blood, saliva can be considered equivalent to blood for genetic applications.