11/17 SDSO PC
http://www.760kfmb.com/story/16068012/mixed-dna-all-over-zahau-death-scene-some-evidence-not-tested
GORE:
 There were 13 specimens taken from her fingernails; 12 of them were only her DNA and I will turn to Mike Grubb to explain to you what the other specimen showed as far as a mixed DNA. And I will slide over so that he can rather than move all the microphones. Hows that? [Reporter: inaudible. Gore: I hate to get out of the camera shot...]
GRUBB:
 Again the majority of the DNA under Rebecca Zahau's fingernails was her own. There was the -- various fingernails were tested as separate samples and one of them showed a DNA mixture, but the level of DNA was so low that it was an un-interpretable mixture. It needs to be realized that DNA can come to be on all sorts of surfaces doorknobs, any public surface can gain DNA from a number of people and it will reside there and may be picked up by someone else. So the finding of a minute amount of very small un- interpretable amount of DNA under somebody's fingernails that may be from someone else is certainly not evidence of homicide.
DAVID GOTFREDSON/CBS8:
 Yeah, but what she said on the show, that there was mixed DNA under her fingernails is actually true, right?
GRUBB:
 There was one of the 13 samples that showed a mixture of DNA under the fingernails, yes, under that one fingernail.
DAVID GOTFREDSON/CBS8:
 And what she said on the show about the underwear, that there was no DNA analysis done on the underwear to actually determine whose underwear it was, thats true as well. Is that right?
GRUBB:
 That's correct. The underwear was collected but as the sheriff has said it was not examined because of Jonah Shacknais statement and the fact that we had better evidence as to whether Rebecca Zahau was sexually assaulted or not and that was her body and the swabs recovered from her body, which showed no sexual assault.
REPORTER:
 There was also a statement from Bremner, and Mr. Grubb you may have to answer this as well, not many people were looked at in terms of DNA who had access to the house, including Jonah Shacknai and Dina Shacknai Romano. Why?
GRUBB:
 Well that is true. I'm not sure I'm the one to answer why we examined those suspects err subjects -- that were submitted to us.
DAVID GOTFREDSON/CBS8: 
Real quick. Was there mixed DNA found anywhere else in terms of the -- I think Ms. Bremner said on the show there was mixed DNA found on gloves, on the bed frame, and on the knife. Is there mixed DNA on those items?
GRUBB:
 I'll run this down for you fairly quickly. Overwhelmingly, in 10 of the 11 rope segments -- err -- samples from the rope was Rebecca Zahaus DNA that was found. In one of those samples there was a fragment of DNA from some other source, absolutely un- interpretable. There was a low level of DNA un-interpretable on the large knife from the bedroom floor. There was a low-level mixture of DNA not interpretable on a doorknob to the balcony. Those are the mixtures that I think she was -- and the black gardening gloves that were recovered from a table at the scene? Again, a low level mixture, un- interpretable.
DAVID GOTFREDSON/CBS8: What about the bed frame?
GRUBB:
 That DNA sample was insufficient for analysis.
DAVID GOTFREDSON/CBS8:
 OK, so if you had taken DNA from Jonah or Dina, wouldnt you have been able to compare that to some of these un-identifiable mixed sources?
GRUBB:
 No, that's the point. When you have a low-level mixture and it's so low that it's un- interpretable, it means that even if we have other subjects to compare, it is not going to be fruitful.