The use of modern technologies that can help optimise the collection of evidence that contains Gunshot Residue (GSR) from crime scene investigation leads to obtaining better results in forensic laboratories. With this objective, equipment based on LIBS (Laser Induced Breakdown Spectroscopy) technology has been developed named iForenLIBS. This study intends to evaluate the effective capacity of the aforementioned system. To do this, results were gathered from the analysis of real samples using LIBS equipment and were compared to those obtained by way of Scanning Electron Microscopy/Energy Dispersive X-ray Spectroscopy (SEM/EDX) in the laboratory. The system has verified its capacity to analyse GSR particles through simultaneous detection of the three characteristic elements of ammunition used (Sb-Pb-Ba) even in stub where only a single particle was found.
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Article Synopsis
- Understanding gunshot residues (GSR) is essential for evidence preservation and linking suspects to crime scenes, focusing on how GSR behaves on various materials like ceramic, glass, metal, paper, and plastic.
- The study uses advanced techniques like scanning electron microscopy and energy dispersive X-ray analysis to quantify GSR particles (lead, barium, and antimony) and examines how different hand cleaning methods affect the transfer of these residues.
- Results show significant differences in GSR transferability across surfaces, with paper holding the most residues, and washing with water and soap leading to the greatest loss of GSR, highlighting the importance of surface properties and cleaning methods in forensic investigations.
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