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Trump said he was perplexed by the fact that authorities informed the media they would be flying aircraft equipped with Bluetooth technology to detect Guthrie's pacemaker.
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As the search for Nancy Guthrie continues, investigators are turning to a small device they hope could lead to a breakthrough: the 84-year-old's pacemaker.
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Authorities insist the case is still very much active, with the FBI receiving more than 19,000 tips. But the case is branching off into some new directions.
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