The disappearance of Today show co-host Savannah Guthrie’s mother Nancy Guthrie remains unsolved even after investigators retrieved video footage of a possible suspect in front of her doors on the ...

How did investigators do it? Persistence and taking advantage of forensic advances.

A member of the FBI's Evidence Response Ream searches an area around Nancy Guthrie's residence in Tucson, Ariz., on Feb. 11. Police say that DNA samples have been recovered in and around Guthrie's ...

Add Yahoo as a preferred source to see more of our stories on Google. In an aerial view, Pima County sheriff's officers gather on Nancy Guthrie's property on February 17 in Tucson, Arizona. - Brandon ...

Alex Sundby is a senior editor at CBSNews.com. In addition to editing content, Alex also covers breaking news, writing about crime and severe weather as well as everything from multistate lottery ...

The FBI is planning on using genetic genealogy in the Nancy Guthrie investigation. On Tuesday, Feb. 17, the Pima County Sheriff’s Department confirmed that a glove found two miles from Nancy's Tucson ...

A genetic expert who helped crack Idaho killer Bryan Kohberger’s case says there’s still hope of building a DNA profile on the glove found near Nancy Guthrie’s Arizona home — even though the FBI came ...

Investigators in Arizona are hoping that DNA found in and around Nancy Guthrie's house in Tucson could lead them to a suspect — and the missing woman. Guthrie, the 84-year-old mother of Today show ...

Officials investigating the disappearance of Nancy Guthrie have recovered DNA from a glove found near her house. If they don't get an exact match, they could turn to genealogy websites for clues. The ...

Only a few years ago, Tuesday’s announcement that a glove believed to be connected to the disappearance of Nancy Guthrie in Tucson, Arizona, had no match in a DNA database would have been a dead end.