"Today" show host Savannah Guthrie's mom was still missing, though there have been some updates in the case. Here's the ...

As law enforcement investigate the abduction of 84-year-old Nancy Guthrie, medical device cyber experts cast doubt on whether ...

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

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

The heart devices do not track location, nor do they transmit across large distances. Like an estimated three million Americans, Nancy Guthrie, the 84-year-old mother of the NBC News anchor Savannah ...

If a person was in a physical struggle, that might have created a rapid heartbeat … the pacemaker would have detected that ...

The grim clue offers a possible time for Nancy Guthrie's abduction from her Tucson home.

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