Investigators in Arizona are intensifying their search for Nancy Guthrie, an 84-year-old woman reported missing nearly three weeks ago. The search effort includes the use of advanced tracking technology known as a “signal sniffer,” specifically designed to locate electronic device signals such as those emitted by Guthrie’s pacemaker.
### Disappearance and Initial Investigation
Guthrie, the mother of “Today” show co-host Savannah Guthrie, vanished from her home in Tucson on February 1, triggering a police investigation after she failed to arrive for church. Authorities reported that her pacemaker was disconnected from its phone application shortly after 2:28 a.m. on the day of her disappearance, raising concerns about her wellbeing and potential abduction.
### The Role of Signal Sniffers in the Search
David Kennedy, a former National Security Agency (NSA) hacker and the inventor of the signal sniffer, shared insights into how the technology can be employed in locating Guthrie. The pacemaker utilizes Bluetooth Low Energy (BLE), which generally has a detection radius of 10 to 15 feet. However, with the addition of signal amplifiers and high-gain antennas, investigators can extend that range significantly—potentially up to several hundred feet.
Kennedy conducted a demonstration at his residence using a modified drone, managing to extend the detection capabilities to about 800 feet. He explained that the pacemaker transmits a signal every two to three minutes. This regular signaling could be captured and used to pinpoint Guthrie’s location, which would be displayed and tracked via her cell phone.
### Current Search Efforts
As part of the ongoing investigation, the tracking device was mounted on a helicopter this past Monday. Reports indicate that the helicopter was maneuvering at a low altitude over areas of interest within Tucson. This aerial approach aims to quickly ascertain a broader location of the missing woman. Kennedy elaborated, stating that a helicopter can provide an immediate assessment, but alternative methods, such as drones, might be more effective for extensive coverage since they navigate larger areas more swiftly.
He noted that while the signal sniffer tech is a relatively new tool for law enforcement, the current operational capabilities are somewhat limited by resource availability. The development of a fleet of drones equipped with this technology would expedite the search process significantly. Kennedy suggested that with a larger number of drones—about 50 to 60—covering the expansive 300 to 800 feet range, the search could be reduced to a matter of days or weeks for a significant area.
### Overcoming Challenges in Technology Deployment
While the use of drones or signal sniffers could enhance search efforts, challenges remain. Kennedy mentioned that physical barriers like metal buildings and concrete walls can disrupt signals, suggesting that outdoor airspace might provide more favorable conditions for signal detection. The current initiative indicates a critical need for coordinated resources and manpower to fully leverage the potential of these technological advancements in search and rescue operations.
Investigators continue to explore all avenues in the search for Nancy Guthrie, who remains unaccounted for as the community anxiously awaits more information.
Source: Original Reporting
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