As the search for Savannah Guthrie's missing mother continues, local authorities have reportedly deployed the use of a "high-tech" scanner in an attempt to track Nancy Guthrie's pacemaker. According to a Saturday, February 14, report from Fox News Digital, law enforcement officials engaged in the ongoing search for Savannah's 84-year-old mother have "used a high-tech Bluetooth scanner placed on the bottom" of "helicopters" in the hopes they can "track" the missing matriarch's pacemaker signal.