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Bullet fragmentation preceding a contour shot: case study and experimental simulation.

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Modified revolvers can cause unusual lethal injuries, with bullets fragmenting and causing distinct wound patterns. This case highlights the importance of analyzing modified firearms in forensic investigations.

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Area of Science:

  • Forensic Ballistics
  • Medico-legal Science

Background:

  • Publications on injuries from modified firearms are scarce, suggesting rarity.
  • Modified firearms exhibit unique ballistic behaviors crucial for forensic analysis.

Observation:

  • A suicide case involving a 60-year-old man using a modified revolver and a lead bullet.
  • The bullet fragmented into two parts: one penetrating the skull, the other traveling between the skull and scalp.

Findings:

  • Ballistic testing on soap and a head model determined the fragmentation angle (55°-60°) and velocity (approx. 200 m/s).
  • The injury pattern matched the experimental results, with one fragment causing an internal cranial injury and the other an external track.
  • The modified revolver was observed to fire two bullets with a single trigger pull, a previously unreported phenomenon in forensic literature.

Implications:

  • Understanding modified firearm ballistics is essential for accurate medico-legal investigations.
  • The double-shot phenomenon requires consideration in forensic casework involving this type of firearm.
  • This study emphasizes the need for thorough examination of modified weapons in lethal injury cases.