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DNA Evidence NPR's Melissa Block reports on the ever-increasing use of DNA testing to catch criminals. The backlog it's created - and calls for more DNA testing - are raising questions about the future of DNA profiling.

All Things Considered

DNA Evidence

Heard on All Things Considered

DNA Evidence

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NPR's Melissa Block reports on the ever-increasing use of DNA testing to catch criminals. The backlog it's created - and calls for more DNA testing - are raising questions about the future of DNA profiling.