We determined after filming that the filter we analyzed on the show was contaminated with Tom Kaye's DNA. Therefore, Sheridan was put back on the table as a suspect.

No I saw that, but I thought I read that the FBI had done a comparison on SP that did not exclude him. Am I mistaken on that?

So, I emailed the two FBI documents detailing the DNA information to my genetic scientist friend (she’s well known, but I’ll protect her privacy for now). This is her response to me:

I just had a chance to read through these two documents.  The first one says that the FBI was able to get DNA from items Q40 and Q41, which they combined.  They were able to obtain a 10 locus CODIS profile from the combined sample.  (Nowadays, CODIS includes 20 loci).  The results indicated that the DNA came from more than one person, but they don't say how many - this is a common because sometimes it's not possible to say how many contributors there are. 

My understanding is that according to CODIS guidelines, a mixture is uploadable to CODIS.  If a suspect is identified, the probability is determined whether it's possible that he is one of the contributors to that mixture.  If the answer is yes, there is more work to do, but I am not sure how they handle that.

The second report (undated but after 2008), says that the evidence was retested, and a male profile was obtained and uploaded to CODIS.  The DNA profile came up with a list of people they wanted to test and compare to the CODIS profile.  But then in 2006, it was decided that the profile was too degraded to identify anyone, but that it could be used to rule out suspects.  But by the date of this report, not many had been tested and compared.

So there seems to be a profile in CODIS that still can be used for comparison, if you manage to get various suspects tested on the CODIS markers.

Not sure if this adds anything to the discussion that hasn’t already been said, but it’s an experts two cents at least.

Could you list the reports/docs you emailed to her?

I concur with her comments - good comments. Tnx!  Her nailing ten loci may indicate she looked up the kit used ... nice. 

The same two that you posted in the news thread.

ok - just trying to make sure I know who and what is doing who and what!    No biggie. Again thanks!! Good work. Thank your friend...

Why has the FBI not uploaded the Cooper DNA profile to GedMatch and attempted forensic genealogy?

Like it or not, the Cooper discussion has wandered into an area where some technical competence is required. There is no way to 'fudge it'. 

NIST, the Ntl Institute of Standards & Technology.gov, has a number of intro level pages on genetics and how genetic material is processed.

In the Cooper case one issue is 'multiple donors' or 'mixed dna samples' - How are multiple donors detected in a sample? How are these samples collected and processed and evaluated?

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Likewise this page explains the term Partial, see:  You are not allowed to view links. Register or Login

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We determined after filming that the filter we analyzed on the show was contaminated with Tom Kaye's DNA. Therefore, Sheridan was put back on the table as a suspect.

No I saw that, but I thought I read that the FBI had done a comparison on SP that did not exclude him. Am I mistaken on that?

I believe you're referencing Sheridan's picture being shown to the witnesses--presumably Tina.

After the initial investigation into Sheridan the FBI said it was going to show his picture to the witnesses to illicit a positive or negative response and that they wouldn't investigate further until that was done. Then a few months later the investigation into Sheridan picked up again.

Did Peterson have blue eyes - yes or no?  Did anyone report Cooper having 'blue' eyes - yes or no ?  Does any CODIS test or other kit test named in this case, test for eye color?

Do you have blue eyes? Does Tom Kaye have blue eyes? My eyes are hazel/green.

These are not trick questions. THIS is an open forum devoted to the discussion of the DB Cooper case!

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We determined after filming that the filter we analyzed on the show was contaminated with Tom Kaye's DNA. Therefore, Sheridan was put back on the table as a suspect.

No I saw that, but I thought I read that the FBI had done a comparison on SP that did not exclude him. Am I mistaken on that?

I believe you're referencing Sheridan's picture being shown to the witnesses--presumably Tina.

After the initial investigation into Sheridan the FBI said it was going to show his picture to the witnesses to illicit a positive or negative response and that they wouldn't investigate further until that was done. Then a few months later the investigation into Sheridan picked up again.

Did Peterson have blue eyes - yes or no?  Did anyone report Cooper having 'blue' eyes - yes or no ?  Does any CODIS test or other kit test named in this case, test for eye color?

Do you have blue eyes? Does Tom Kaye have blue eyes? My eyes are hazel/green.

These are not trick questions. THIS is an open forum devoted to the discussion of the DB Cooper case!

Are you 100% certain that DB Cooper had brown eyes? Are you 100% certain that DB Cooper did not have blue eyes?

If yes, how?

I am not 100% Cooper wasn't a camel or a Unicorn!     Or a phantasm.        Or a mass delusion.             Or a hockey puck.           

I am 100% certain you will never stop playing high stakes holdem games trying to stack the deck and all discussion in your favor. I am 10000000000000% certain of that.

For all others, there are good movies about CODIS and forensics at You Tube.  People might view a few of those several times. Because discussion about the Cooper case is either going NOWHERE or its going SOMEWHERE - and may get technical and boil down to technical issues most people dont have any knowledge of. Its an individual choice but the choices do exist. Good luck.     

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We determined after filming that the filter we analyzed on the show was contaminated with Tom Kaye's DNA. Therefore, Sheridan was put back on the table as a suspect.

No I saw that, but I thought I read that the FBI had done a comparison on SP that did not exclude him. Am I mistaken on that?

I believe you're referencing Sheridan's picture being shown to the witnesses--presumably Tina.

After the initial investigation into Sheridan the FBI said it was going to show his picture to the witnesses to illicit a positive or negative response and that they wouldn't investigate further until that was done. Then a few months later the investigation into Sheridan picked up again.

Did Peterson have blue eyes - yes or no?  Did anyone report Cooper having 'blue' eyes - yes or no ?  Does any CODIS test or other kit test named in this case, test for eye color?

Do you have blue eyes? Does Tom Kaye have blue eyes? My eyes are hazel/green.

These are not trick questions. THIS is an open forum devoted to the discussion of the DB Cooper case!

Are you 100% certain that DB Cooper had brown eyes? Are you 100% certain that DB Cooper did not have blue eyes?

If yes, how?

I am not 100% Cooper wasn't a camel or a Unicorn!     Or a phantasm.        Or a mass delusion.             Or a hockey puck.           

I am 100% certain you will never stop playing high stakes holdem games trying to stack the deck and all discussion in your favor. I am 10000000000000% certain of that.

In other words, NO.

Once again, ladies and gentlemen of the Jury, I rest my case.

You have no JURY. You only have your self and your fans. Thats all you care about. I think you probably chose the DB Cooper case because it looked like easy pickings.

The rest of us have or had different goals. The rest of us have different backgrounds from different lives built over many years. None of us are running for political office trying to tell others what to do! Good luck with that EU.      

Its all about choice. And the choices people strive to get the opportunity to make. As long as there still remain choices to get to make!