Nancy Guthrie investigators use high-tech Bluetooth signal detector in effort to locate pacemaker

The search for Nancy Guthrie has taken a high-tech turn.

The Arizona police department is now flying over the Tucson, Ariz., desert with a Bluetooth signal detector, also known as a signal sniffer, in an attempt to detect a signal from Guthrie’s pacemaker.

The elderly woman’s pacemaker disconnected from the app on her phone just before 2 a.m. on Feb. 1, and her Nest Cam also disconnected around that time.

Nancy, 84, the mother of “Today” show co-host Savannah Guthrie, was first reported missing from her home on Feb. 1, after she failed to turn up for church services that Sunday.

Her residence quickly became designated a crime scene.

Law enforcement sources found a trail of blood outside of Nancy’s home.

Several ransom notes have been sent to news organizations, including TMZ, demanding payment in bitcoin by specific deadlines.

Last week, the FBI shared frightening photos and video of a masked person approaching Nancy’s home in the early morning hours of Feb. 1.

They also released a suspect description for the alleged kidnapper, describing him as a male who’s approximately 5-foot-9 or 5-foot-10, with a medium build.

The suspect tampered with a home security camera, wore a weapon on their waistband and had a bulging backpack.

At least four people have been detained for questioning, but there has been no breakthrough in the case. Delivery driver Carlos Palazuelos was detained for questioning last Tuesday, but quickly released after maintaining his innocence.

Pima County Sheriff Chris Nanos confessed that the search for Nancy could take “years” but promised not to give up.

“Maybe it’s an hour from now,” Nanos told the New York Times on Friday. “Maybe it’s weeks or months or years from now. But we won’t quit. We’re going to find Nancy. We’re going to find this guy.”

Savannah and her siblings have released videos on Instagram, tearfully pleading for their mother’s safe return and thanking the public for their prayers and well-wishes.

The FBI also announced that they were upping a reward “for information leading to the location of Nancy Guthrie and/or the arrest and conviction of anyone involved in her disappearance” to $100,000.