How "signal sniffer" technology is being used in the search for Nancy Guthrie
Investigators are employing 'signal sniffer' technology to detect signals from Nancy Guthrie's pacemaker in the ongoing search for the 84-year-old missing woman from Tucson, Arizona. The device, invented by former NSA hacker David Kennedy, has been mounted on a helicopter to extend its range, highlighting new possibilities for law enforcement in abduction cases.



















