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Misleading Entry Wounds From Atypical Bullet Behavior.

Lucien C Haag¹, Alexander Jason²

¹From the Forensic Science Services, Inc, Carefree, AZ.

The American Journal of Forensic Medicine and Pathology

|November 7, 2021

Summary

This summary is machine-generated.

Certain pistol bullets can cause misleading entry gunshot wounds. This study reveals how specific bullet types maintain forward flight after exiting a victim, creating atypical secondary wound appearances.

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Murine Excisional Wound Healing Model and Histological Morphometric Wound Analysis

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Area of Science:

Forensic Science
Ballistics
Wound Analysis

Background:

Atypical pistol bullet behavior can lead to misinterpretation of gunshot wound entry characteristics.
Distinguishing primary from secondary gunshot wounds is crucial in forensic investigations.

Purpose of the Study:

To investigate and demonstrate the atypical wound ballistic behavior of specific pistol bullets.
To differentiate between primary and secondary gunshot wound characteristics caused by these bullets.

Main Methods:

High-speed videography of projectile-tissue interaction.
Doppler radar and laser tracking for projectile trajectory analysis.
Analysis of bullet orientation, deflection, and "bullet wipe" on clothing.

Main Results:

Truncated cone and flat-point full-metal-jacketed bullets (9mm, .40, .45 caliber) often exit victims without yawing, maintaining nose-forward flight.
These bullets can create normal-appearing entry wounds on secondary targets, mimicking primary strikes.
Destabilized common pistol bullets typically yaw or tumble upon exiting.

Conclusions:

Specific pistol bullet designs can produce secondary gunshot wounds that are erroneously identified as primary.
Understanding atypical bullet behavior is essential for accurate forensic wound interpretation.