Did Paul Holes recreate a slice of Ancestry.com?
May 5, 2018 21:52:14 GMT
almagata, loveliftedme, and 2 more like this
Post by Any of N on May 5, 2018 21:52:14 GMT
On various message boards, we speculated over the years about combining DNA results with genealogy records. First find a set of potential relatives and then go about investigating those people the old fashioned way, with gumshoe detective work. While the linked DNA-genealogy info is exactly what Ancestry.com provides (as do other commercial services), it's typically not available to LE without a court order. Someday, at some point in the future, all that would be available to them via their own comprehensive government-generated databases. No warrants needed and everything right at their fingertips. But that might well come much too late to find a living GSK, so what to do in the meantime?
The answer seems to be: (1) use open source genetic databases and (2) hire professionals to painstakingly compile the relevant genealogy records. Paul Holes and colleagues basically recreated slices of Ancestry.com, the slices they needed. Simple in concept but requiring an awful lot of leg work. Or so it seems to me. Anyone disagree or have any insight?
If this is right, it leads to a couple of questions...
How long has this been going on?
I had assumed that LE was playing around with this approach for years. (There were indications.) Some of the recent media reports seem to conflict with each other. The process that led to DeAngelo started in March, or something like that. Then there was the POI in Oregon who had DNA collected on his deathbed last year. The statements from Holes himself are very general.
Was there anything really new-new involved?
GEDmatch, the open source service involved, has been around for years. Aligning DNA with genealogy records is a well-established practice. This is apparently the first time that LE put so much time and resources into this approach. Is that what's new? Or was it in producing DNA results form semen samples that are compatible with the commercial services (typically obtained with cheek swabs)?
Here are a couple of sources:
The answer seems to be: (1) use open source genetic databases and (2) hire professionals to painstakingly compile the relevant genealogy records. Paul Holes and colleagues basically recreated slices of Ancestry.com, the slices they needed. Simple in concept but requiring an awful lot of leg work. Or so it seems to me. Anyone disagree or have any insight?
If this is right, it leads to a couple of questions...
How long has this been going on?
I had assumed that LE was playing around with this approach for years. (There were indications.) Some of the recent media reports seem to conflict with each other. The process that led to DeAngelo started in March, or something like that. Then there was the POI in Oregon who had DNA collected on his deathbed last year. The statements from Holes himself are very general.
Was there anything really new-new involved?
GEDmatch, the open source service involved, has been around for years. Aligning DNA with genealogy records is a well-established practice. This is apparently the first time that LE put so much time and resources into this approach. Is that what's new? Or was it in producing DNA results form semen samples that are compatible with the commercial services (typically obtained with cheek swabs)?
Here are a couple of sources:
...In the end, the key to cracking the Golden State Killer case lay in public databases and records.
In January of this year, Holes obtained a backup DNA sample from a 37-year-old murder in Ventura County in Southern California that had been preserved in a freezer. With this larger quantity of DNA, the investigators were able to run it on a “microarray” that simultaneously tests for hundreds of the thousands of genetic markers spread across the whole human genome.
The same technology is used by the ancestry testing companies to match their customers to potential relatives, so Holes created a fake identity and uploaded the profile to GEDMatch. The most promising match shared a quantity of DNA suggesting that it was a second cousin of the killer.
Then came the painstaking process of using public records and local newspapers to extend family trees out from the matching profiles to find living people with close relatives connected to the locations where the murders and rapes happened.
“Obituaries are one of the best things out there,” Holes said. “Census records are awesome.”
The best match turned out to be another false lead. Although the family tree Holes and his colleagues constructed led to a potential suspect, he was cleared when a sibling voluntarily gave a DNA sample.
It took a five-person team four months to work from potential third or fourth cousins of the killer to finally identify DeAngelo as the leading suspect — succeeding where four decades of conventional police work had failed.
Cops Forced A Company To Share A Customer’s Identity For The Golden State Killer Investigation, BuzzFeed, May 1, 2018.
In January of this year, Holes obtained a backup DNA sample from a 37-year-old murder in Ventura County in Southern California that had been preserved in a freezer. With this larger quantity of DNA, the investigators were able to run it on a “microarray” that simultaneously tests for hundreds of the thousands of genetic markers spread across the whole human genome.
The same technology is used by the ancestry testing companies to match their customers to potential relatives, so Holes created a fake identity and uploaded the profile to GEDMatch. The most promising match shared a quantity of DNA suggesting that it was a second cousin of the killer.
Then came the painstaking process of using public records and local newspapers to extend family trees out from the matching profiles to find living people with close relatives connected to the locations where the murders and rapes happened.
“Obituaries are one of the best things out there,” Holes said. “Census records are awesome.”
The best match turned out to be another false lead. Although the family tree Holes and his colleagues constructed led to a potential suspect, he was cleared when a sibling voluntarily gave a DNA sample.
It took a five-person team four months to work from potential third or fourth cousins of the killer to finally identify DeAngelo as the leading suspect — succeeding where four decades of conventional police work had failed.
Cops Forced A Company To Share A Customer’s Identity For The Golden State Killer Investigation, BuzzFeed, May 1, 2018.
Police haven’t yet publicly detailed the methods that led them to DeAngelo. Yet DNA experts say the simple upload-and-match scenario wouldn’t have worked in this case. DeAngelo’s DNA wasn’t in any police database. And snippets collected from crime scenes aren’t in the same form as the DNA in genealogy sites. In addition, consumer testing companies don’t participate in criminal investigations without a warrant. Even if a company was willing to help, police didn’t have saliva or cheek swabs from potential suspects the companies need to conduct their tests. So investigators would have had to do a lot of genetic legwork to get the DNA data and format it in a way that GEDmatch could recognize.
Colleen Fitzpatrick and Margaret Press have pioneered a way to do just that. The pair cofounded the DNA Doe Project, a nonprofit that uses genetics and genealogy to put a name to remains from unidentified people, including crime victims. The techniques developed for their organization are probably the same ones used in the Golden State Killer case, Fitzpatrick and Press say.
...
Police “followed this genetic lead to try to investigate this case in a novel way,” says Katsanis. “But it took a lot of resources. ... If they’d had the wrong DeAngelo, it would have been a lot of investigation for nothing.” Such extensive genetic detective work is difficult and takes money and manpower most jurisdictions can’t spare, says Katsanis.
New genetic sleuthing tools helped track down the Golden State Killer suspect, ScienceNews, April 29, 2018.
Colleen Fitzpatrick and Margaret Press have pioneered a way to do just that. The pair cofounded the DNA Doe Project, a nonprofit that uses genetics and genealogy to put a name to remains from unidentified people, including crime victims. The techniques developed for their organization are probably the same ones used in the Golden State Killer case, Fitzpatrick and Press say.
...
Police “followed this genetic lead to try to investigate this case in a novel way,” says Katsanis. “But it took a lot of resources. ... If they’d had the wrong DeAngelo, it would have been a lot of investigation for nothing.” Such extensive genetic detective work is difficult and takes money and manpower most jurisdictions can’t spare, says Katsanis.
New genetic sleuthing tools helped track down the Golden State Killer suspect, ScienceNews, April 29, 2018.