TUCSON, Ariz. (13 News) - As the disappearance of Nancy Guthrie enters its third week, the FBI is using new technology that could help locate her using signals from her pacemaker. Law enforcement is ...

Flying helicopters low and slow over the Tucson desert in Arizona, the FBI has been using "signal sniffers" to try to locate Nancy Guthrie's pacemaker. As the search for the 84-year-old mother of US ...

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 ...

You will learn how pacemaker data has already sharpened the timeline in Nancy Guthrie’s disappearance and what investigators can — and cannot — hope to get from the device and its manufacturer. Law ...

TUCSON, Ariz. (KOLD/Gray News) - As the search for 84-year-old Nancy Guthrie enters its third week, the FBI is employing new technology that could help locate her using signals from her pacemaker. Law ...