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Principles of Forensic DNA for Officers of the Court

DNA Extraction

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Illustration of DNA strand coming out of blood stain on fabric
National Institute of Justice (NIJ) (see reuse policy).

DNA extraction is the process of separating DNA from other cellular material contained in the biological evidence recovered. This is one of the most labor-intensive procedures of the DNA analysis. The DNA extraction process requires careful handling of biological material to prevent sample contamination.

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