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48 Hours S30 E47 | DNA evidence is not always infallible

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DNA evidence is not always infallible

2min
DNA is the gold standard for many cold case investigators - but what happens if police get it wrong? Correspondent Richard Schlesinger discusses the grave consequences. For more, watch "Blood in the Sand" " airing Saturday, June 9 at 10 p.m. ET/PT on CBS. Air Date: Jun 6, 2018
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