A pen as an intermediate target becomes a secondary projectile

Area of Science:

• Forensic Pathology
• Ballistics
• Trauma Analysis

Background:

• Firearm projectiles can create secondary projectiles upon striking intermediate targets.
• These secondary projectiles can result in distinct injury patterns.
• Understanding these patterns is crucial for forensic investigations.

Observation:

• A case is presented where a father accidentally discharged a handgun while demonstrating its firing pin mechanism to his son.
• A pen was placed in the barrel, unknown to the father, a live round was chambered.
• The discharge resulted in a fatal injury to the son.

Findings:

• The pen acted as an intermediate target, becoming a secondary projectile.
• The resulting injuries exhibited characteristics of secondary projectile trauma, including pseudo-stippling and a discrepancy between skin defects and counted projectiles.
• These patterns were identifiable and supported autopsy and scene investigation findings.

Implications:

• Recognizing injury patterns from intermediate target involvement in gunshot wounds is vital.
• This recognition aids in reconstructing events and supporting forensic conclusions.
• Such analysis enhances the accuracy of gunshot wound investigations.