Leading forensic scientists have dramatically upped their estimate of the number of serial killers currently operating across the nation. They base their new estimate on the nation's scary number of active missing person cases (100,000 in any year) combined with its gruesome backlog of unidentified human remains (about 40,000)--the latter piling up in medical examiner's offices and police evidence warehouses across the country.Last spring, Popular Science allowed me to delve into the subject with an in-depth look at some promising, high-tech solutions. It's in the January 2009 issue, now online.
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