Iowa State researchers say inconclusive reports in forensic cartridge-case comparisons conceal exculpatory evidence. (IMAGE)

Iowa State University

Iowa State researchers say inconclusive reports in forensic cartridge-case comparisons conceal exculpatory evidence.

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Iowa State researchers say inconclusive reports in forensic cartridge-case comparisons conceal exculpatory evidence. 

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Graphic design by Deb Berger/Iowa State University.

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