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Analysis of gunshot residue deposited on cotton cloth target at close range shooting distances

The study of gunshot residue (GSR) has become imperative in forensic firearm examination. It may be used to estimate firing distance, to identify bullet holes and to determine whether or not a person has discharged a firearm. This study emphasized on the ex amination of the pattern of GSR particles...

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Main Authors: A. Halim, Mohamed Izzharif, Ahmad, Umi Kalthom, Chong, Hooi Yew, Abdullah, Muhammad Koey
Format: Article
Language:English
Published: School of Health Sciences, USM Kubang Kerian 2010
Subjects:
QD Chemistry
Online Access:http://eprints.utm.my/id/eprint/43960/1/Article%2008.pdf
http://eprints.utm.my/id/eprint/43960/
http://www.forensics.org.my/img/Article%2008.pdf
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spelling my.utm.439602017-02-07T03:51:35Z http://eprints.utm.my/id/eprint/43960/ Analysis of gunshot residue deposited on cotton cloth target at close range shooting distances A. Halim, Mohamed Izzharif Ahmad, Umi Kalthom Chong, Hooi Yew Abdullah, Muhammad Koey QD Chemistry The study of gunshot residue (GSR) has become imperative in forensic firearm examination. It may be used to estimate firing distance, to identify bullet holes and to determine whether or not a person has discharged a firearm. This study emphasized on the ex amination of the pattern of GSR particles deposited on cotton cloth target at different shooting distances (3 inch-12 inch). Two types of pistol (semiautomatic and revolver) and ammunitions (Syarikat Malaysia Explosive (SME) and Winchester) were used for the shooting test. All shooting tests were performed at Lapang Sasar of Pasukan Gerakan Am PDRM, Cheras. The results showed that GSR particles produced on cotton cloth by semiautomatic pistol using SME 9 mm ammunition generated higher amount and larger GSR particles which were almost completely burnt particles. The nitrite residues were confirmed using modified Griess test that revealed semiautomatic pistol produced considerable amount of nitrite residues. Scanning Electron Microscope (SEM) micrograph of GSR particles discharged from semiautomatic pistol using SME 9 mm ammunition revealed a mean particle size of 2.6 µm with spherical shapes. On the other hand, using revolver pistol with SME 0.38 Special ammunition, the GSR particles produced were small in amount. The modified Griess test also revealed that revolver pistol generated tiny amount of nitrite residues. Nevertheless, using Winchester 0.38 Special ammunition, the GSR particles discharge were of high amount and large in size which composed of completely unburned, partially burnt and completely burnt particles. Whereas SEM micrograph of GSR particles discharged from revolver pistol using Winchester 0.38 Special ammunition generated irregula r cluster grain with a mean diameter of 3.3 µm. Sodium rhodizonate test was successfully applie d for detecting the presence of lead residues around the bullet hole for both pistols. School of Health Sciences, USM Kubang Kerian 2010 Article PeerReviewed text/html en http://eprints.utm.my/id/eprint/43960/1/Article%2008.pdf A. Halim, Mohamed Izzharif and Ahmad, Umi Kalthom and Chong, Hooi Yew and Abdullah, Muhammad Koey (2010) Analysis of gunshot residue deposited on cotton cloth target at close range shooting distances. Malaysian Journal of Forensic Sciences, 1 (1). pp. 48-53. ISSN 2180-1126 http://www.forensics.org.my/img/Article%2008.pdf
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic QD Chemistry
spellingShingle QD Chemistry
A. Halim, Mohamed Izzharif
Ahmad, Umi Kalthom
Chong, Hooi Yew
Abdullah, Muhammad Koey
Analysis of gunshot residue deposited on cotton cloth target at close range shooting distances
description The study of gunshot residue (GSR) has become imperative in forensic firearm examination. It may be used to estimate firing distance, to identify bullet holes and to determine whether or not a person has discharged a firearm. This study emphasized on the ex amination of the pattern of GSR particles deposited on cotton cloth target at different shooting distances (3 inch-12 inch). Two types of pistol (semiautomatic and revolver) and ammunitions (Syarikat Malaysia Explosive (SME) and Winchester) were used for the shooting test. All shooting tests were performed at Lapang Sasar of Pasukan Gerakan Am PDRM, Cheras. The results showed that GSR particles produced on cotton cloth by semiautomatic pistol using SME 9 mm ammunition generated higher amount and larger GSR particles which were almost completely burnt particles. The nitrite residues were confirmed using modified Griess test that revealed semiautomatic pistol produced considerable amount of nitrite residues. Scanning Electron Microscope (SEM) micrograph of GSR particles discharged from semiautomatic pistol using SME 9 mm ammunition revealed a mean particle size of 2.6 µm with spherical shapes. On the other hand, using revolver pistol with SME 0.38 Special ammunition, the GSR particles produced were small in amount. The modified Griess test also revealed that revolver pistol generated tiny amount of nitrite residues. Nevertheless, using Winchester 0.38 Special ammunition, the GSR particles discharge were of high amount and large in size which composed of completely unburned, partially burnt and completely burnt particles. Whereas SEM micrograph of GSR particles discharged from revolver pistol using Winchester 0.38 Special ammunition generated irregula r cluster grain with a mean diameter of 3.3 µm. Sodium rhodizonate test was successfully applie d for detecting the presence of lead residues around the bullet hole for both pistols.
format Article
author A. Halim, Mohamed Izzharif
Ahmad, Umi Kalthom
Chong, Hooi Yew
Abdullah, Muhammad Koey
author_facet A. Halim, Mohamed Izzharif
Ahmad, Umi Kalthom
Chong, Hooi Yew
Abdullah, Muhammad Koey
author_sort A. Halim, Mohamed Izzharif
title Analysis of gunshot residue deposited on cotton cloth target at close range shooting distances
title_short Analysis of gunshot residue deposited on cotton cloth target at close range shooting distances
title_full Analysis of gunshot residue deposited on cotton cloth target at close range shooting distances
title_fullStr Analysis of gunshot residue deposited on cotton cloth target at close range shooting distances
title_full_unstemmed Analysis of gunshot residue deposited on cotton cloth target at close range shooting distances
title_sort analysis of gunshot residue deposited on cotton cloth target at close range shooting distances
publisher School of Health Sciences, USM Kubang Kerian
publishDate 2010
url http://eprints.utm.my/id/eprint/43960/1/Article%2008.pdf
http://eprints.utm.my/id/eprint/43960/
http://www.forensics.org.my/img/Article%2008.pdf
_version_ 1643651328500563968
score 13.211869

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