Law enforcement is working with a device known as a “signal sniffer” that uses an amplifier to find Bluetooth signals and identify the unique MAC [Media Access Control] address of Guthrie’s pacemaker using a directional antenna.
“It’s got software running in it, continuously scans, and if it doesn’t recognize (hers), it just eliminates it until it locks onto the right one,” said Morgan Wright, CEO and founder of the
National Center for Open and Unsolved Cases.
Wright, who also analyzes true crime cases on
Substack, said the process is similar to walking around with Guthrie’s cellphone and waiting for a Bluetooth connection request but on a much larger scale
The FBI's use of new technology could be a turning point in narrowing down the timeline of Nancy Guthrie’s disappearance and where she might be now.
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