Authorities in Arizona are using advanced technology from the air as they continue searching for Nancy Guthrie, who vanished nearly two weeks ago. Investigators are flying over the Tucson desert with specialized equipment designed to detect a Bluetooth signal from her pacemaker, hoping it will help pinpoint her location.

A helicopter operated by the Pima County Sheriff’s Department has been moving slowly in a systematic grid pattern over the terrain near Nancy’s residence, attempting to pick up a signal from the implanted device, Fox News reported.

Residents previously noticed a helicopter flying in a comparable pattern close to her upscale home just days after she went missing. However, it remains uncertain whether that aircraft was equipped with the same Bluetooth-detecting technology at the time, according to Fox.

The effort to locate Savannah Guthrie’s mother has now stretched into its second week. Nancy Guthrie was reported missing on Feb. 1, after she was last seen at approximately 9:30 p.m. on Jan. 31. Authorities continue to focus their search in the area surrounding her Tucson home as the investigation remains active.