How "signal sniffer" technology is being used in the search for Nancy Guthrie
CBSN
Investigators are using a tracking device called a "signal sniffer" that can detect signals emitted from electronic devices as the search for Nancy Guthrie continues in its third week. Jonathan Vigliotti and Pat Milton contributed to this report. In:
Investigators are using a tracking device called a "signal sniffer" that can detect signals emitted from electronic devices as the search for Nancy Guthrie continues in its third week.
David Kennedy, a former NSA hacker and inventor of the signal sniffer being used in the investigation, told CBS News that because Guthrie's pacemaker was disconnected from the app on her phone, it indicates the device is equipped with Bluetooth Low Energy technology, a power setting designed so the device will last multiple years.
Nancy Guthrie, the 84-year-old mother of "Today" show co-host Savannah Guthrie, was reported missing when she failed to show up for church on Feb. 1, after vanishing in the middle of the night from her home in Tucson, Arizona, in an apparent abduction. Authorities said Guthrie's pacemaker was disconnected from the pacemaker app on her cellphone at 2:28 a.m.
Kennedy said Bluetooth Low Energy only has a 10- to 15-foot radius, but with signal amplifiers and high-gain antennas, the radius can extend to several hundred feet.
He said after conducting a test at his home using a non-commercial drone and off-the-shelf items to modify it, he was able to extend the device's detection range to about 800 feet.
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