A preliminary investigation into the use of FTIR microscopy as a probe for the identification of bullet entrance holes and the distance of firing

Sharma, S.P.; Lahiri, S. C.

doi:10.1016/j.scijus.2008.07.002

Cited by 28 publications

(18 citation statements)

References 23 publications

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“…Many studies have applied visual inspection, chemical (Walker test, Greiss test, etc.) as well as microscopical (scanning electron microscopy coupled to elemental analysis) or instrumental techniques (atomic absorption spectroscopy, neutron activation analysis) to the identification and quantification of GSR deposits on garments [14][15][16][17][18][19][20][21][22][23][24][25].…”

Section: Discussionmentioning

confidence: 99%

Micro-CT features of intermediate gunshot wounds covered by textiles

et al. 2016

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The analysis of gunshot residue (GSR) on the clothing and the underlying skin of the victim may play an important role in the reconstruction of the shooting incident. The aim of the present study was to test micro-computed tomography (micro-CT) for the analysis of firearm wounds experimentally produced on human skin covered by textiles. Firing trials were performed on 60 sections of human calves enveloped by a single layer of fabric (cotton or jeans or leather or nylon) and 15 controls consisting of bare calves. Experimental firings were conducted in a ballistic laboratory at three different muzzle-to-target distances (5, 15, and 30 cm), using a .32 ACP pistol (Beretta Mod. 81) loaded with full-jacketed bullets coming from the same production lot (7.65 × 17 mm, Browning SR). The visual inspection revealed the classic pattern of GSR distribution on the fabrics and the skin of control samples, while only a dark ring around the entrance lesion was identified on the skin beneath the fabrics. Micro-CT analysis showed the presence of radiopaque material on all entrance wounds, with a statistically significant difference between cases and controls. No differences were found among specimens covered by fabrics, with regard to the firing distance and the type of clothing. No GSR-like deposits were detected in exit wounds. Our results suggest that micro-CT analysis may be a useful screening tool for differentiating entry from exit gunshot wounds when the covering textiles are contaminated, damaged, or missing.

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Section: Discussionmentioning

confidence: 99%

Micro-CT features of intermediate gunshot wounds covered by textiles

et al. 2016

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“…Teknika hau batez ere tiro egin duen pertsonaren eta jomugaren artean dagoen distantzia ezagutzeko [34,35], balaren sarrerako zuloa identifikatzeko [35] eta munizio eta tiro-aztarnen karakterizaziorako erabili izan da (5. irudia) [36,37].…”

Section: Tiro-aztarna Organikoen Analisiaunclassified

Tiro-aztarnen identifikazioa, auzitegi-laborategien erronka

Unceta

Grijalba²,

Benito³

et al. 2015

EKAIA

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Laburpena: Azken urteotan, su-armen erabilera nabarmen handitu da gure gizartean eta horrek tiro egin ondoren sortutako partikulen analisirako metodologia berriak garatzea ekarri du. Krimenaren gertalekuan tiro-aztarnak (gunshot residue, GSR) osatzen dituzten konposatuen detekzioak eta identifikazioak su-armen erabileraren ebidentzia fidagarria eskaintzen dute. Tiro-aztarnak erretako eta erre gabeko partikulen multzoa dira, munizioa erretzen denean sortutakoak eta su-armak berak, jaurtigaiak eta kartutxoak askatutako konposatuez osatuak. Tiro egin ostean, partikulak tiroa gertatu den tokiaren inguruan jalkitzen dira, baina, batez ere, tiratzailearen gorputzean (eskuak, sudurra eta ilea) eta arropetan. Gaur egun, GSR partikulen ohiko analisia konposatu ez-organikoen identifikazioan oinarritzen da. Konposatu organikoen azterketak (organic gunshot residues, OGSR) lagin baten froga-balioa indartu dezake. Hala ere, gutxi dira OGSRen dudarik gabeko identifikaziorako guztiz sentikorrak diren metodoak. Lan honetan, beraz, tiro-aztarnen lagin-biltzea eta analisirako teknika aipagarrienak laburbildu eta berrikusten dira. Hitz-gakoak:Auzitegiko zientzia, tiro-aztarna ez-organikoak (IGSR), tiro aztarna organikoak (OGSR), lagin-biltzea, metodo analitikoak. Abstract:In the last years, the use of firearms has increased considerably in our society which has raised the development of new analytical methodologies in order to detect the particles formed during shooting. The detection and identification of compounds consistent with gunshot residues (GSR) in a crime scene provides forensic evidence of the use of firearms. These particles are a set of burned and unburned particles formed as a result of the combustion process of ammunition and contain components expelled from the firearm itself, the projectile and the cartridge case. After the discharge, particles are deposited on all surfaces in the vicinity where the shot has taken place but mainly in shooter's body (hands, nose and hair) and clothing. Currently, conventional analysis of GRS is focused on inorganic components. The study of organic components may strengthen the probative value of a sample. However, only a few studies propose analytical methods sensitive enough to identify OGSR. The cur-

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“…1,2 However, the recognition of GSR based only in those three metals has some disadvantages such as the increasing use of lead-free ammunition, the abundance of these elements in the environment and working places, which can cause false positive results, among others. [3][4][5][6] Moreover, the analysis procedure is time consuming and the acquisition and maintenance of the required equipment is costly, which strongly limits the massive application of this technique. In this context, some alternative methods for metallic detection have been applied such as graphite furnace atomic absorption spectrometry (GF-AAS), inductively coupled plasma optical emission spectrometry (ICP-OES), laser inductive breakdown spectrometry (LIBS) and inductively coupled plasma mass spectrometry (ICP-MS).…”

Section: Introductionmentioning

confidence: 99%

Screening of Gunshot Residue in Skin Using Attenuated Total Reflection Fourier Transform Infrared (ATR FT-IR) Hyperspectral Microscopy

Álvarez

Yáñez

2020

Appl Spectrosc

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The detection of gunshot residues (GSR) in skin is important in criminal forensic investigations related with firearms. Conventionally, the procedure is based on the detection of metallic or inorganic residues (IGSR). In this work, we propose attenuated total reflectance Fourier transform infrared (ATR FT-IR) hyperspectral microscopy as a complementary and nondestructive technique for detection of organic GSR (OGSR). The spectra were acquired from GSR of three ammunition manufacturers, which were collected from shooter’s hands by the tape-lifting method. Before spectroscopic analysis, a Na–Ca bleach solution was added to all GSR samples on the tape for destroying skin debris. Positive detection of OGSR spectra were achieved by ATR FT-IR hyperspectral microscopy. Spectra show characteristic patterns of nitrate ester compounds which agrees with the propellant chemical composition. Characteristic ATR FT-IR spectral patterns of OGSR were measured from visualized GSR particles demonstrating the potential of ATR FT-IR hyperspectral microscopy.

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A preliminary investigation into the use of FTIR microscopy as a probe for the identification of bullet entrance holes and the distance of firing

Cited by 28 publications

References 23 publications

Micro-CT features of intermediate gunshot wounds covered by textiles

Micro-CT features of intermediate gunshot wounds covered by textiles

Tiro-aztarnen identifikazioa, auzitegi-laborategien erronka

Screening of Gunshot Residue in Skin Using Attenuated Total Reflection Fourier Transform Infrared (ATR FT-IR) Hyperspectral Microscopy

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