No DNA match from gloves, but Guthrie investigators have other DNA tools

DNA from gloves found two miles from Nancy Guthrie's Tucson home — including one that looked similar to those worn by the suspect seen on surveillance video — did not match anyone in the FBI's federal DNA database, authorities said Tuesday.

It also did not match DNA found at Guthrie's property, which is being analyzed and needs further testing, the Pima County Sheriff's Department said. That DNA doesn't belong to Guthrie or anyone close to her, investigators have said. 

"Investigators are currently looking into additional investigative genetic genealogy options for DNA evidence to check for matches," the department said Tuesday, adding that the FBI's database is "one option of many databases that are available."

Investigative genetic genealogy is a forensic technique in which consumer genealogy databases with public access are searched to find familial matches to crime-scene DNA, to build a family tree and narrow down potential suspects, according to the National Institutes of Health. 

The DNA news comes a day after Sheriff Chris Nanos released a statement saying that members of the Guthrie family have been cleared as possible suspects in the disappearance of the 84-year-old mother of NBC "Today" show anchor Savannah Guthrie.

Nancy Guthrie was forcibly taken from her home in the early morning hours of Feb. 1, investigators say. She was last seen Jan. 31, when a family member took her home after she spent the evening with her daughter, Annie Guthrie, and son-in-law, Tommaso Cioni.

Investigators found the gloves on Feb. 12 within a 2-mile radius of Guthrie's home. One glove appeared to match the gloves seen in doorbell camera video footage of an armed man at Nancy Guthrie's Catalina Foothills home.

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The DNA was sent to a lab in Florida, and the analysis was forwarded to the FBI on Tuesday morning, the Sheriff's Department said in Tuesday's media update.

The FBI ran the results through CODIS — Combined DNA Index System, which compares DNA profiles from offenders nationwide — but came up with no hits.

Tuesday's updates from the Sheriff's Department also focused on these topics:

• Nancy Guthrie’s pacemaker: Investigators are attempting to locate the device and are working with the manufacturer and other experts in the field to assist.
• Doorbell video released by the FBI: Investigators are working with Walmart management to identify and isolate the individual who purchased a 25-liter Ozark Trail Hiker Pack backpack seen in the surveillance video.

Ozark backpacks are private-label products owned by Walmart and are sold exclusively at the store.

• Tips: The FBI's National Threat Operations Center has received more than 18,000 tips related to the  Guthrie case since Feb. 1 to 1-800-CALL-FBI and tips.fbi.gov. 

Also, the Sheriff's Department has received more than 28,500 9-1-1 calls since Feb. 1, but doesn't break out how many are related to Guthrie; the total received is about 10,000 more than in the same period last year.