Guthrie has been missing for nearly three weeks after disappearing from her home in Tucson, Arizona on February 1. Law ...

The disappearance of Nancy Guthrie, 84, in Tucson has triggered one of Arizona’s largest recent search efforts, with tens of ...

The “ethical hacker” who created the Bluetooth “signal sniffer” being used to try and track Nancy Guthrie’s pacemaker said he created the high-tech tool specifically for the search to find the missing ...

(MENAFN- Live Mint) Authorities searching for Nancy Guthrie are deploying a piece of specialized tracking technology - commonly referred to as a“signal sniffer” - in an effort to detect emissions from ...

Investigators searching for Nancy Guthrie reportedly used a helicopter-mounted "signal sniffer" to detect her pacemaker signal. What is it?

A signal sniffer is the police's latest hope in the Nancy Guthrie case as Today’ show host Savannah Guthrie's mother remains missing.

Investigators are using signal sniffer to try to detect Nancy Guthrie's pacemaker.