You step into a story that begins with a promise and ends with answers decades later. A young man told his mother he would be back that night and vanished; after nearly 40 years, investigators have ...

Authorities insist the case is still very much active, with the FBI receiving more than 19,000 tips. But the case is branching off into some new directions.

The Pima County Sheriff's Department says Guthrie's disappearance is being investigated as a kidnapping.

Authorities trying to solve the disappearance of Nancy Guthrie say they might tap DNA genealogy databases, the same step that ...

Investigators searching for clues in the Arizona kidnapping of Nancy Guthrie are turning to genetic genealogy, a forensic technology that has already helped to crack several notorious cold cases in ...

Lion DNA has been used to successfully prosecute poachers for the first time in the world, it has emerged. Wildlife crime ...

The DNA found on a glove located near Nancy Guthrie's home did not match any profiles in the FBI's database.

James Oliver Unick, a 66-year-old resident of Willows, was found guilty of dragging 13-year old Sarah Geer into an alley, sexually assaulting her and strangling her to death in 1982 in Cloverdale, the ...

Forensic genealogy has helped investigators track down serial killers, now police are using it to try to identify Nancy Guthrie's kidnapper. The post Forensic genealogy helped catch killers. Can it ...

In the search for Nancy Guthrie, investigators turn to genetic genealogy, the tactic previously used to connect Bryan ...