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Collecting DNA Evidence at Property Crime Scenes



To collect DNA evidence, the following should be stored in a preassembled response kit:

  • Latex gloves and related Personal Protective Equipment (PPE).
  • Swabs (sterile), wooden or plastic.
  • Swab boxes or other suitable container for packaging of swabs.
  • Tweezers.
  • Disposable razor blade or scalpel.
  • Scissors.
  • Distilled water.
  • Bleach sterilization solution ( 1:10), made fresh daily.
  • Alcohol pads for cleaning.
  • Envelopes or bindle paper.
  • Paper wrapping.
  • Paper bags.
  • Pens/markers.
  • Evidence tape.
  • Biohazard labels.

Personal Protective Equipment (PPE) to maintain safety and aid in the prevention of cross-contamination includes the following:

  • Latex or nitrile gloves.
  • Eye protection.
  • Paper mask that covers nose and mouth.
  • Tyvek white paper body suit.
  • Sleeve protectors.
  • Shoe covers.
  • Hair net.

Cleaning Re-usable Implements

When disposable instruments cannot be used in evidence collection, reusable implements must be properly cleaned. Clean the implements between collection of evidence items with a sterilizing solution, such as bleach and water ( 1:10 ) made fresh daily. This procedure includes thorough cleaning with the bleach solution, wiping or rinsing with alcohol or water and drying.

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