Firearms injuries

on 6.2.09 with 0 comments

  • Bullet types

    • Lead: round nose, hollow point, etc

    • Partial metal jacket: soft-point, hollow point (stay in body; cops use ‘em)

    • Full metal jacket: leave body; military use

    • Special purpose: KTW (armor piercing)

  • Never use metal clamps to remove a bullet…screws up rifling marks

  • Entrance wounds

    • Marginal abrasions with a central defect

    • Contact or near contact

      • Over bone see soot, lacerations, and skin tears

      • Over soft-tissue: stippling and soot

      • Cherry red (from CO), charring, and muzzle imprint

    • Short-range: presence of soot

    • Intermediate range: stippling (tattooing), no soot

    • Long range or any range covered by clothes: just central defect with marginal abrasion

    • Eccentric: the bullet entered at an angle, so the marginal abrasion’s only on one side

    • Concentric: bullet was perpendicular; marginal abrasion all around wound

  • Exit wounds

    • Are usually stellate

    • There may be a slit from bullet or fragments

    • Shored (supported by belt, bra, etc) – may have a marginal abrasion

  • Beveling of bone

    • Penetrating wound (head trauma) bone will be beveled on inner table of skull

    • Perforating wound (head trauma) bone will be beveled on the inner table of the skull at the entrance site and the outer table of the skull at the exit wound

  • Temporary cavities are directly related to the amount of KE absorbed by the tissue

Category: Forensic Medicine Notes , Medical Subject Notes



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