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Considerations

Home > Characterization and Evaluation of Fired Projectiles > Physical Features > Weight > Considerations

When obtaining the remaining weight of a fired evidence bullet, the examiner should bear in mind the following considerations:

  • Laboratory safety protocols should be followed.
  • Laboratory trace evidence policies should be followed prior to and during removal of any material adhering to a bullet.
  • Bullets should be cleaned so as to not damage the surfaces potentially bearing microscopic marks.
    • Soak in a mild detergent to loosen any adhering material. Gently scrub using a soft bristled toothbrush.

      -and/or-

    • Ultrasonic cleaner

      Courtesy of Ronnie Freels

    • Use an ultrasonic cleaner and appropriate fluid.
      • Follow the manufacturer’s recommendations.
      • Treat one bullet/fragment at a time.
      • Monitor and observe bullets during treatment; ultrasonic cleaning may alter the microscopic details on the surface of a bullet.
    • Use appropriate tools to mechanically remove debris (e.g., embedded wood particles, bone, cartilage).
  • Weigh each bullet fragment separately because they may or may not originate from a single bullet. Individually weighed fragments can be regrouped later, if necessary.

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