A court case lead to a quantitative determination of lead and antimony by atomic-absorption at distances 10 to 20 cm from the bullet hole. As a surprising result at first the area-concentrations of lead and antimony increased with rising distance from the muzzle and reached a maximum, after that maximum like expected a decrease was found. The phenomena is of general interest because otherwise misinterpretations in chemical determination of gunshot firing distances would be possible.
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Forensic Sci Res
December 2024
Department of Forensic Chemistry, Criminal Investigation Police University of China, Shenyang, China.
Unlabelled: In forensic laboratories, analytical investigations of gunshot residues (GSRs) are usually conducted by scanning electron microscopy (SEM) in combination with energy dispersive X-ray microanalysis. If GSRs are covered with bloodstains, SEM cannot detect them. In this study, an inductively coupled plasma mass spectrometry method is proposed to solve this problem.
View Article and Find Full Text PDFAnalyst
November 2024
School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore.
In firearm forensic investigations, detecting gunshot residue (GSR) is crucial for linking firearms to suspects and determining firing distance for forensic reconstruction. Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-ToF-MS) is emerging as a versatile and promising technological platform for fingerprint analysis. The capability of functionalized particles as an advanced dusting powder for visualizing latent fingerprints is widely recognized.
View Article and Find Full Text PDFInt J Legal Med
November 2024
Department of Dentistry, University of Brasília, Campus Darcy Ribeiro, Asa Norte, Brasília, 70910-900, Distrito Federal, Brazil.
Leg Med (Tokyo)
November 2024
Forensic Medicine and Clinical Toxicology, Faculty of Medicine Alexandria University, Egypt. Electronic address:
This article presents two cases of fatal injuries from rifled weapons with unconventional shapes of inlets and exits mismatched with the distance of firing. According to forensic literature, in long-distance ranges, we expected to see rounded entry wounds smaller than bullet size, circular in shape without associates with limited damage in the tissues. In the first case, there were large wounds which did not match a distance of more than 2 m, while in the second case, the distance was more than 30 m with large wounds 21 × 10 cm and massive damage to bones and lungs.
View Article and Find Full Text PDFArch Med Sadowej Kryminol
October 2024
Faculty of Medical Sciences, Academy of Silesia, Poland.
Introduction: In accordance with the Polish law, pneumatic weapons are weapons that use compressed gas to set a bullet in motion and generate a discharge energy of more than 17J. In recent years, Poland has seen an increase in crimes committed with pneumatic weapons. The research aim of the present study was to measure the velocity of selected 5.
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