Man detained near Tucson home where Nancy Guthrie was allegedly abducted. Video shows field sobriety test as search continues ...

An expert tells PEOPLE why pacemakers have Bluetooth technology, and how it can help locate Savannah Guthrie’s missing mother Nathan Congleton/NBCU Photo Bank/NBCUniversal via Getty The Bluetooth ...

Add Yahoo as a preferred source to see more of our stories on Google. As people follow Nancy Guthrie's disappearance, people are wondering how investigators are using her pacemaker to find her.

The "signal sniffer" being used in the Nancy Guthrie investigation was mounted on a helicopter on Monday.

The Pima County Sheriff's Department previously highlighted the significance of Nancy’s pacemaker in the investigation, revealing additional details about its role in an approximate timeline of her ...

Emily Mae Czachor is a reporter and news editor at CBSNews.com. She typically covers breaking news, extreme weather and issues involving social justice. Emily Mae previously wrote for outlets like the ...

Authorities are hoping Nancy Guthrie’s pacemaker may assist them in locating her exact whereabouts as the investigation into her disappearance reaches week three. On Tuesday, February 17, the Pima ...

Morgan Wright, CEO and founder of the National Center for Open and Unsolved Cases, told KOLD that software runs continuous scans to recognize whether the signals emitted are coming from Guthrie’s ...

The FBI is using advanced bluetooth technology to try to find Nancy Guthrie's pacemaker. Pacemakers emit signals that could provide clues to the whereabouts of the missing 84-year-old. Flying ...

In Week 4 of Nancy Guthrie's search, new surveillance footage from the night of the abduction has surfaced. Cops have detained a man who drove by Nancy's home '50 to 100 times'. Details inside.

They’re searching for Nancy Guthrie’s heartbeat. Cops are flying over the Tucson desert with a high-tech Bluetooth signal detector, also known as a signal sniffer, in an attempt to locate a signal ...

TUCSON, Ariz. (KVOA) - On Feb. 3, two days after Nancy Guthrie disappeared, a Pima County helicopter was flying low to the ground, just above Guthrie's home in the Catalina Foothills. Investigators ...