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Principles of Forensic DNA for Officers of the Court

Handling of Test Items

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

Forensic science places stringent requirements on the handling of test items to ensure their integrity. Chain of custody and retention of samples for retesting are non-technical examples.

In regard to testing, the laboratory must have and apply procedures to protect test items from avoidable loss, contamination, and degradation. These begin with the packaging and preservation of samples and apply continuously through processing, testing, and short- and long-term storage.

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