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What Every Law Enforcement Officer Should Know About DNA Evidence

Investigators and Evidence Technicians

Absorbent Surface Procedures

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Procedures for collecting wet stains on absorbent surfaces are:

  • Submit the entire item if possible
  • Use one or more sterile cotton swabs to soak up the stain
  • If the stain is small, concentrate the stain on the tip of the swab (the swab stick may be wooden or plastic)
  • Document that the stain was found wet and identify from where the stain was collected

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