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Improved method for shooting distance determination. Part 2--bullet holes in objects that cannot be processed in the
Glattstein1, Zeichner, Vinokurov
1Division of Identification and Forensic Science, Israel National Police Headquarters, Jerusalem.
Journal of Forensic Sciences
|September 27, 2000
Summary
This study presents a new method for determining firearm discharge distance on large exhibits like cars or furniture. It involves transferring residues to an adhesive lifter for analysis, improving forensic investigations.
Area of Science:
- Forensic Science
- Analytical Chemistry
Background:
- Determining firearm discharge distance is crucial in forensic investigations.
- Traditional laboratory methods are often impractical for large, immovable exhibits.
Purpose of the Study:
- To develop an improved, field-applicable method for firing distance determination.
- To enable analysis of nitrite, lead, and copper residues on large exhibits.
Main Methods:
- A novel method involving transfer of total nitrite (ions and smokeless powder residues) to an adhesive lifter.
- Visualization of vaporous lead and copper deposits on the target using sodium rhodizonate and rubeanic acid.
- Application of the Modified Griess Test after alkaline hydrolysis of residues on the lifter.
Main Results:
- Successful transfer and analysis of gunshot residue components from various large exhibits.
- Effective visualization of lead and copper vaporous deposits around bullet entrance holes.
- Quantification of smokeless powder residues via the Modified Griess Test.
Conclusions:
- The described method offers a practical solution for firing distance determination on challenging exhibits.
- This technique enhances the capabilities of forensic analysis in real-world scenarios.
- The method provides reliable data for reconstructing shooting incidents.
