The sheriff’s office said they ruled out Guthrie’s three adult children and their spouses as suspects.

Pacemaker tracking technology used in Nancy Guthrie case reveals how medical devices become surveillance tools for law ...

Pacemaker tracking technology used in Nancy Guthrie case reveals how medical devices become surveillance tools for law enforcement investigations.

The Pima County Sheriff's Department previously highlighted the significance of Nancy’s pacemaker in the investigation, ...

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

Savannah Guthrie's 84-year-old mother Nancy has been missing since February 1, and it is believed she was taken from her home ...

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 ...

Unconfirmed media reports say Nancy Guthrie's pacemaker stopped syncing with her Apple devices. Here's what that means.

As the search for Savannah Guthrie's mother, Nancy, continues, a cardiologist explains how pacemakers work and if they can be used to track a missing person's location.

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 ...

Information about Nancy Guthrie's pacemaker helped authorities piece together a new timeline in her kidnapping. Can the ...

Balance athletic goals with arrhythmia risk: match the device model and sensor to the sport, and use stress testing to set detection zones and avoid inappropriate therapy.