We believe that we may have some DNA there that may be our suspect, but we won’t know that until that DNA is separated, sorted out, maybe admitted to CODIS, maybe through genetic genealogy," Nanos said.
Investigators are now turning to genetic genealogy, which has previously successfully identified other high-profile criminals like the Golden State Killer and University of Idaho murderer Brian Kohberger.
"If I was the kidnapper, I would be extremely concerned right now, because using investigative genetic genealogy, he will be identified," DNA expert CeCe Moore told "TODAY" Thursday.
Authorities, however, are not allowed to use well-known genealogy sites such as Ancestry.com or 23andMe, and will have to rely on publicly available DNA databases to test the DNA. Moore noted that the process may take a while.
"If they have deep roots in the United States, it could be minutes, it could be a few hours," Moore said. "But if it’s somebody who doesn’t have connections to the U.S. in their tree in more recent generations, then it could take much longer."
Nancy Guthrie, 84, was reported missing on Feb. 1 from her home in the Tucson, Arizona, area. She was last seen the night before, when family dropped her off at home.
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