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Popular ideas about police crime labs have been formed by television programs like "NCIS" and "CSI," where highly trained, usually ethical technicians use science to solve crimes and put criminals behind bars.
But recent major scandals are challenging those perceptions, and prompting some in Congress to consider legislation aimed at improving oversight of the nation's crime labs. Critics are skeptical that reform is likely.
From the Here & Now Contributors Network, Deborah Becker of WBUR reports.
This segment aired on January 8, 2014.