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Bullet identification with radiography
R P Bixler1, C R Ahrens, R P Rossi
1Department of Radiology, School of Medicine, University of Colorado Health Sciences Center, Denver 80262.
Radiology
|February 1, 1991
Summary
This study presents a simple radiographic technique to accurately estimate bullet weight and caliber, even for deformed projectiles. This method aids in forensic investigations by providing reliable ballistics data.
Area of Science:
- Forensic Science
- Radiology
- Ballistics
Background:
- Accurate determination of bullet weight and caliber is crucial in forensic ballistics.
- Existing methods may struggle with deformed bullets, necessitating reliable alternatives.
Purpose of the Study:
- To develop and validate a simple radiographic method for estimating bullet weight and caliber.
- To provide a technique applicable to both deformed and undeformed bullets with known confidence levels.
Main Methods:
- Utilized three orthogonal radiographs to derive bullet cross-sectional area.
- Correlated cross-sectional area with bullet weight using a database of 48 human-recovered bullets.
- Developed distinct equations for bullets weighing ≤5.8 g and >5.8 g.
- Implemented a direct caliber calculation from bullet diameter for undeformed bullets.
Main Results:
- The radiographic method accurately predicted the weight and caliber of tested bullets.
- The technique proved effective for a wide range of bullet shapes, including deformed ones.
- When one method was not applicable, the alternative provided reliable results.
Conclusions:
- The developed radiographic method offers a reliable tool for estimating bullet weight and caliber in forensic casework.
- The findings support its potential use in legal testimony for gunshot investigations.