I think we are saying some of the same things in different ways. As you say, the original testing done in Christine's case yielded results not compatable with Canada's dna data bank. So the testing procedure did indeed change over time as evidenced.
No doubt the early dna test incompatable with todays data base, could exclude GPM as well as anyone else even today if they were tested under the same procedure for the same markers.
The 6 new markers compatable with the data base in combination with and along with the old markers would yield a very specific and highly definitive result. As said, it may take some expert to explain this properly and adequately as to whether the test process indentifying the markers can be translated one process to another. Is B on a marker under one process the same as B under another? Can they be translated via software? Are any of the markers tested for under the old test, included in the new?
An employee of a dna lab verbally claimed some of the older markers once tested for were included in the new tests. Which ones (if true) are unknown. I hope to get more information on that in the next while. Even if and or no matter which process was employed, they have a lot of dna markers to work with.
No matter any of that, we have the Police saying a profile has been entered. We know the general process allows for a profile with less than all 13 markers to be entered. The California example shows 7 as minimum but that was without the benefit of having a complete backup profile using the other older markers as a double blind test.
Which was why I also said,
Of course any hits would have to be scrutinized and possibly some manual testing done in conjunction with whatever the tests results were but all in all, it is entirely possible and plausible Christine's killer is in the system.
I think I said before that it may not be a question of if they have a profile entered into the system, its more how. I see possibilities of that being possible and tend to accept the Police saying it is over having to believe them lying. Exactly how this is possible may be a question for a forensic expert. It may be by unusual/ non standard means requiring some manual inputs. If some forensic expert is available to show exactly how, all the better.
For now if anyone wishes to believe the Police that they have entered a profile or not is their choice. I suppose you can find ammunition for either side of the argument. Someone from within LE or the Justice Department with the specific knowledge could probabaly answer in a much more appropriate fashion, how.
New processes are being investigated and inplemented all the time and DNA is still an evolving science. Some of the latest testing like that done through the geneological researchers is showing promise for Policing now too. Some of the new comparisons are being made through new computer software analysis of older dna tests.
Some testing results from some newer tests are not compatable with the dna data base either but are further definitive of a suspects id. They are add on tests when the results of the original weren't so definitive. Of course these sort of tests would have to be requested and be done manually as well.
from-
http://www.policechiefmagazine.org/magazine/index.cfm?fuseaction=display_arch&article_id=1320&issue_id=112007
One of the difficulties associated with DNA analysis is that if a sample contains DNA from more than one individual (known as a mixed profile), the profiles cannot be easily separated, reducing the overall success of the testing. The solution to this problem will be aided by the ongoing development and refinement of computer software to assist scientists in reaching objective and unbiased interpretations. In the future, continued improvements in technology will permit laboratories to process more samples and improve their ability to interpret mixed profiles.
A common example of a mixed profile is that obtained in a sexual offense in which semen is recovered from the body of a woman. In some circumstances, the DNA contribution from the female may be far greater than that of the male perpetrator. To date, forensic scientists need to take advantage of physical/chemical properties of the sample and their own interpretation skills to generate profiles specific to the male contributor. Where there is only a trace amount of DNA from the male or where there is more than one male contribution, it is not always possible to generate a result from the perpetrator that can be utilized in the investigation.
However, a new technique being applied more extensively in such cases is Y-STR analysis. The Y chromosome is a male-specific identifier, and typing techniques are now available that develop profiles specific to the male contributor of the DNA. The advantage of this test is in its high level of sensitivity; the test is able to generate a profile of a male perpetrator in the presence of DNA from a female contributor