Forensic Investigation: Bullet Holes in Glass Lab
Bullet Holes in Glass
Glass broken through a projectile forms two distinct fracture types -- radial fractures and concentric fractures (Orthman & Hess, 2012). The radial fractures will often form on the glass side, on the opposite side of the impact, and will spread outwards from the point of impact (Hess & Hess, 2012). Concentric lines form after the radial fractures, on the same side of the impact, and will often encircle the point of impact (Woods, 2013). Radial fractures terminate if they encounter fractures caused by an earlier projectile, which basically means that they can be used to determine the order or sequence of force, or rather, which bullet hole was created before the other. In cases where multiple shots are fired from the opposite sides of a glass surface say a window, forensic investigators will often need to establish the order in which the shots were fired (Woods, 2013). The first shot to be fired on the surface will often produce complete and uninterrupted radial fractures, and the subsequent bullet holes will have their radial cracks terminated once they encounter cracks or fractures resulting...
Forensic analysis has also been used successfully in many paternity cases. Furthermore, the advantages of Forensic DNA technology are extensive and have been employed in forensic fields such as the detection of bacteria and various other pollutants in water and in the matching of recipients in organ donor programs. It should also be noted that forensics is a field that covers many areas and fields of knowledge and which can
Forensics, Law, & Psychology: False Confessions It is a well accepted law in the forensic field, that only recently slipped through, that investigations can be helped by compelling people to confess. However this forensic law that encourages and enables forced confession spirals off methodological research in psychology that shows that such confessions can be harmful to the field since many prisoners end off confessing under duress and admitting to actions that
Forensics: Signature Analysis Forensic examination and analysis of writer identification and verification are reported as having "applications in various domains. Especially in the field of biometric recognition. Forensic Document Examination (FED) is a process that clarifies the writer of a handwritten document. Applications included are signatures verification. FED is such that is reported to have been based primarily on manual examination by experts with only recent automation of analysis methods being
This phase is described by Carrier as the phase where we "...use the evidence that we found and determine what events occurred in the system" (Carrier, 2005). 2.2. The United States Department of Justice's (USDOJ) digital forensic analysis methodology The second methodology under review in this paper has been put forward by the United States Department of Justice. This consists of four basic phases: collection, examination, analysis and reporting (Shin, 2011).
He noted the uneven pattern, which he knew would make a match easier. Crime library's Kathleen Ramsland writes in the Most Famous Bite Mark, "In his expert testimony, Souviron described the bite mark on Lisa Levy as the jury examined the photographs. He pointed out how unique the indentation mark was and showed how it matched the dental impressions of Bundy's teeth. He showed them the structure of alignment, the chips, the
Forensics Scenario Discussion From the onset, it is important to note that in criminal investigations, one type of evidence commonly encountered is hair evidence (Oien, 2009). As Oien further points out, "during the course of the normal hair-growth cycle, hairs are readily lost from individuals, and these hairs may be transferred during the course of a criminal activity." The hairs collected from the seat of the car in the scenario recounted could
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