Signal sniffer to detect Nancy Guthrie's pacemaker deployed, sources say

A instrumentality to observe emissions from Nancy Guthrie's pacemaker is among the tools investigators are utilizing arsenic their hunt for her continues into its 3rd week, instrumentality enforcement sources told CBS News. 

The high-tech tracking tool, called a "signal sniffer," has been mounted connected a chopper and whitethorn assistance detectives pinpoint her location, the sources said. Signal sniffers are often utilized successful missing idiosyncratic cases due to the fact that they tin observe low-power physics signals, specified arsenic those emitted by a pacemaker.

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