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GUN SHOT RESIDUE ANALYSIS BY VARIABLE PRESSURE SEM-EDXA

机译：变压SEM-EDX分析枪炮残渣

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摘要

Crimes involving firearms are serious and the investigating efforts are challenging. In crimes involving firearms, Gun Shot Residues (GSR) ejected from a gun during its discharge form one of the crucial evidence. If GSR evidence is properly collected and correctly analyzed, this trace evidence can associate the suspect with the firing of the gun in question, identify the bullet hole on target material and estimate the range of fire. Though several established techniques based on qualitative and quantitative analysis of gun shot residues are available, the famous Aerospace Report of USA could demonstrate the importance of GSR Particle Analysis Technique using Scanning Electron Microscope coupled with Energy Dispersive X-ray Analyzer (SEM-EDXA) in the analysis of this vital evidence. This article is a short overview on detection and analysis of GSR with special emphasis on GSR Particle Analysis Technique. The subsequent developments of this technique like the introduction of Variable Pressure SEM-EDXA in the GSR analysis and its forensic significance are also discussed in this article. As the analysis of GSR particles using VP SEM-EDXA is different from the coventional method, analysis of GSR particles sampled from the hands of a suspect and examination of bullet hole on target material using VP SEM-EDXA are also studied and the findings are presented here.
机译：涉及枪支的犯罪是严重的，调查工作具有挑战性。在涉及枪支的犯罪中，枪支释放过程中从枪支中弹出的枪支残留物（GSR）是重要证据之一。如果正确收集了GSR证据并对其进行了正确分析，则这些痕迹证据可以将嫌疑犯与相关枪支的发射联系起来，确定目标材料上的弹孔，并估计射程。尽管有几种基于定性和定量分析枪支残留物的成熟技术可用，但美国著名的《航空航天报告》可以证明使用扫描电子显微镜结合能量色散X射线分析仪（SEM-EDXA）的GSR颗粒分析技术的重要性。对这一重要证据的分析。本文是对GSR的检测和分析的简短概述，特别着重于GSR颗粒分析技术。本文还讨论了该技术的后续发展，例如在GSR分析中引入可变压力SEM-EDXA及其法医学意义。由于使用VP SEM-EDXA分析GSR颗粒与常规方法不同，因此还研究了使用VP SEM-EDXA分析从犯罪嫌疑人手中取样的GSR颗粒和检查靶材上弹孔的方法，并提出了发现结果。这里。

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