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What Every Law Enforcement Officer Should Know About DNA Evidence

Investigators and Evidence Technicians

Polymerase Chain Reaction (PCR)

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National Institute of Justice (NIJ) (see reuse policy).

Laboratories now are using PCR (Polymerase Chain Reaction) technology to analyze DNA. This technology is highly sensitive and can generate a reliable DNA profile from a crime scene stain that is as small as the size of a pin head. Because newer DNA tests are based on sensitive PCR technology, more attention must be paid to preventing contamination at the crime scene.

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