Does anyone know if their were dna matches secured on the letters or stamps back in 2002. Apparently the hoax letters had a match, but what about the confirmed zodiac letters? Just wondering because I read someone said matches were secured and then another person said there weren’t any. Did the dna come from the same person?
"Dr. Cydne Holt earned her Ph.D in Cell and Molecular Biology at Baylor College of Medicine where she studied cell cycle genetics. Cydne was then trained as a Criminalist at the Santa Clara County District Attorney Criminalistics Laboratory in Santa Clara, CA covering crime scene response and forensic biology. Cydne was honored to be a part of the first R&D team that designed and validated the PCR based forensic DNA typing systems that transformed casework and database efforts, to aid more criminal cases than ever before. Dr. Holt then brought those capabilities back into an operational setting as the DNA Technical Leader, and then Forensic Services Director."
Before she could rule out suspects in the 2002 analysis, she had to be confident that the DNA on more than one confirmed letter could not be excluded from each other. The question you have to ask yourself, is do you believe this trained forensic specialist, who has no agenda, or believe people whose suspects have been ruled out, who attempt to denigrate the validity of the results.
All media comments made by Holt & detectives at the time point to a partial profile found on a single stamp. Example:
CARROLL: Well, what we can see about Arthur Leigh Allen is that his DNA profile does not match the partial DNA profile that we have recovered so far from one of the known Zodiac letters.
http://transcripts.cnn.com/TRANSCRIPTS/ … sm.30.html
However, Mike Rodelli claims that, based on his sources, Holt actually combined samples from various letters.
http://www.zodiackillersite.com/viewtop … =25&t=1460
But I have never heard of matching DNA from the 2002 tests. Officially or unofficially. 
"And so it follows that if there were too few cells on any given stamp or envelope, the only way to get enough cells to perform PCR is to combine samples from multiple sources. And lo and behold, in 2009 we learn that this is exactly what Holt apparently did in 2002!" Mike R.
I highly respect Mike, but even I know that combining samples from various letters to achieve the required cells for PCR is a flawed technique. You have to be certain all letters are genuine Zodiac letters. If I know that, I’m sure Cydne Holt, who is far more intelligent than me in this field, knows that. To believe she would combine samples, without verification that what she is combining originated from the same source, is something a trained forensic biologist would not do in this instance.
"Dr Holt has already detected the possible presence of Zodiac’s DNA in the seal of the envelope that contained the greeting card (Dripping Pen Card and 340 cipher), and just in case that test fails to provide a full DNA profile, she also prepares to look for DNA beneath the stamps on two of these three letters (July 31st letters)." Dr Cydne Holt "Depending on whether those DNA’s match each other, might allow me to include or exclude Arthur Leigh Allen as potentially contributing the DNA on the Zodiac letters."
The key word is "match" each other, not combine. Only then can she rule out Allen. My guess is that the DNA deception thread would not exist if Kjell Qvale had not been excluded as Zodiac. It may be a case of attack the messenger, because you don’t like what the message says.
