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

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.

Nancy Guthrie’s 2 a.m. pacemaker spike on the day she vanished could mean that the elderly woman was involved in a heart rate ...

Cybersecurity expert Morgan Wright analyzes Nancy Guthrie's abduction and highlights a 41-minute window between the doorbell ...

Police investigating Nancy Guthrie's disappearance focus on specific January dates, seeking surveillance footage as the ...

Heart failure affects millions of Americans, but treatment options have evolved over the years. WellSpan Health is helping ...

Nancy Guthrie remains missing as ransom notes, new suspect images and a released person of interest deepen the mystery.

Nest security camera footage taken five miles from Nancy's Tucson property on the night of her disappearance is under ...

But the Johnson County Coroner’s Office and local funeral homes are teaming up to put those devices to use for people in need ...

Investigators say they are also looking into an alleged ransom note in the disappearance of Nancy Guthrie, which gave the ...

A law enforcement source told Fox News Digital that the 84-year-old's pacemaker last synced with her Apple devices around 2 a ...