Investigators searching for Nancy Guthrie reportedly used a helicopter-mounted "signal sniffer" to detect her pacemaker ...

The “ethical hacker” who created the Bluetooth “signal sniffer” being used to try and track Nancy Guthrie’s pacemaker said he created the high-tech tool specifically for the search to find the missing ...

Authorities are attempting to use the device to detect the signal on Nancy's pacemaker over two weeks after she was reported missing ...