Anti-K
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Touch DNA is primary/secondary/tertiary/etc. DNA transferred or deposited from skin cells and DNA from bodily fluids is a whole nother animal.
The type of DNA collected is not determined by the method of collecting the sample.
Primary/secondary/tertiary/etc. refers to transfer of DNA. DNA in skin cells is exactly the same as the DNA from bodily fluids.
In the Jonbenet case, it is not known what the tDNA came from. BODE has said probably skin cells, but it might not be. The DNA found on the panties? Probably saliva. But it might not be. Regardless of the source, the DNA is the same.
A few years ago tDNA and LCN were considered the same thing. But, LCN is a process used when the tDNA sample is too small for the regular process. tDNA is essentially DNA transferred when someone touches something and that DNA is transferred in varying amounts and sometimes it is transferred in amounts sufficient for the use of the regular process. tDNA is not just LCN and so the two terms are no longer considered synonymous.
Since tDNA is not visible to the naked eye, new methods of collection had to be developed mostly very simple methods such as taping and scraping. If one of these novel methods is, than the DNA is tDNA; BUT, the DNA in tDNA is just DNA.
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AK