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What Every Law Enforcement Officer Should Know About DNA Evidence

Investigators and Evidence Technicians

Packaging Procedures

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Image of gloved technician holding swab over evidence
National Institute of Justice (NIJ) (see reuse policy).

The procedures for packaging of this evidence are:

  • Air-dry swabs as soon as possible after collection
  • Place the swabs in separate containers and refrigerate
  • Double-tipped swabs should not be used
  • Use dry implements

Anytime you transfer material for collection, you create the chance of diluting or contaminating your evidence.

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