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When a crime is committed, fragmentary (or trace) evidence needs to be collected from the scene. A team of specialised police technicians goes to the scene of the crime and seals it off. They record video and take photographs of the crime scene, victim/s (if there are any) and items of evidence. If necessary, they undertake ballistics examinations.
Trace evidence is found in many different forms with some examples including, but not limited, to fire debris, gunshot residue, glass fragments, and fibres. [2] Each of these types of evidence will have a trained analyst in that specific field who will conduct the analysis on these items.
Forensic identification is the application of forensic science, or "forensics", and technology to identify specific objects from the trace evidence they leave, often at a crime scene or the scene of an accident. Forensic means "for the courts".
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TRACE is a connectionist model of speech perception, proposed by James McClelland and Jeffrey Elman in 1986. [1] It is based on a structure called "the TRACE", a dynamic processing structure made up of a network of units, which performs as the system's working memory as well as the perceptual processing mechanism. [ 2 ]
Types of trace evidence that could be recovered include skin, glass fragments, body hair, fibers from clothing or carpets, soil particles, dust and bodily fluids. The study of this trace evidence could be used to link a piece of footwear to a location or owner. DNA can be one of the contributing factors in forensic footwear evidence.
Arguably, a crime scene reconstructionist is a forensic scientist who specializes in interpreting and assembling evidence in a coherent manner. Chisum and Turvey explain that to perform crime reconstruction one need not "be an expert in all forensic disciplines" but "must become an expert in only one: the interpretation of the evidence in context."
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