A device that can pick up certain electronic signals is being used in the search for Nancy Guthrie, as it may detect emissions from her pacemaker, sources told CBS News. ... विस्तार से पढ़ें और पूरी खबर जानें। स्रोत: https://www.cbsnews.com/news/signal-sniffer-detect-nancy-guthrie-pacemaker-deployed-law-enforcement-sources/