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What Every Law Enforcement Officer Should Know About DNA Evidence

Investigators and Evidence Technicians

Considerations for Blood Evidence

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Image of evidence technician placing evidence in paper bag
National Institute of Justice (NIJ) (see reuse policy).

Considerations for blood evidence:

  • Air-dry entire item or swabs that were used to collect the evidence
  • Label every item, package and seal (separately) in paper bags or boxes
  • Keep all blood evidence as cold as possible
  • Submit all evidence to the laboratory as soon as possible

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