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Social and Behavioral Sciences Commons™
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Full-Text Articles in Social and Behavioral Sciences
Estimating Muzzle To Target Distance From The Physical Characteristics Of A Bullet Hole In Different Wood Substrates, Alan Lee
Student Theses
Determining the muzzle to target distance of a firearm discharge is an integral part in crime scene reconstruction. Shooter distance is most often estimated using the Modified Griess test, which can be used to visualize gunshot residue (GSR) patterns around bullet holes. However, this test has a 3- to 5-feet range limit as the plume of GSR particles can only travel a certain distance past the muzzle. The purpose in this study was to develop a new method that overcomes this range limitation by analyzing the physical damage characteristics of a bullet hole. Test fires were conducted with a .22 …
Environmental Factors Affecting Rapid Shear In Fibers From The Passage Of A Bullet, Laura Molina
Environmental Factors Affecting Rapid Shear In Fibers From The Passage Of A Bullet, Laura Molina
Student Theses
Evaluation of fabric defects may provide insight on the specific cause of fiber fracture. In forensic casework, fabric defects may provide a determination of previous occurrences connected to a case. Different methods of fabric breakage impart differing physical characteristics on individual fibers. These alterations to otherwise highly ordered fibers are determined by a multitude of factors, among them temperature. The process of rapid shear occurs in thermoplastic materials following high-speed impact. It results in distinct features caused by excessive heat generated through the interaction which is unable to dissipate at a rate that would leave the fibers unchanged. Rapid shear …