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Bloodstain pattern analysis: The identification and evaluation of reusable surfaces for the reconstruction of BPA events

Pandita, Rochelle (2020) Bloodstain pattern analysis: The identification and evaluation of reusable surfaces for the reconstruction of BPA events. Masters by Coursework thesis, Murdoch University.

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Abstract

In violent crimes, bloodshedding events are common, in which various and disperse bloodstains and bloodstain patterns are of essential evidentiary value for criminal investigations. The examination, interpretation, and reconstruction of bloodletting events are commonly undertaken by qualified Bloodstain Pattern Analysis (BPA) analysts, who are able to comprehend the sequences of events that have transpired at the bloodshedding incident. Subsequent to the identification and interpretation of bloodstain patterns at a crime scene, the analysis of an impact pattern is imperative for the reconstruction of a crime scene. Impact patterns are generated when liquid blood is struck by an object, resulting in the distribution of airborne blood droplets at a substantial distance from the source. Droplets adhere to the nearest surface, therefore, creating the pattern. Appropriate bloodstains (in other words, stains selected based on fundamental features) would be selected on the impact pattern, thus, providing an accurate representation of the Area of Convergence. Combining the angle of impact for the selected bloodstains with the Area of Convergence provides the three-dimensional spatial representation of the blood source location. Studies have revealed that the determination of the blood source is a crucial aspect in the reconstruction of crime scenes. Currently, the educational and professional sectors utilise paper to line the interior surfaces of facilities for the reconstruction of BPA events since an innovative application is unavailable. Ascertaining a reusable surface would be valuable to BPA analysts and students when practising their reconstructive techniques on BPA events since there is limited literature available on reusable surfaces that could aid in the reconstruction of BPA events. The determination of an applicable reusable surface is a novel experiment; the evaluation of the current literature in all aspects of BPA should be researched more extensively in order to discover an appropriate reusable surface that would not influence the determination of the spatter events. In addition to this, the study is able to aid in the validation of the AOO determination of painted surfaces encountered at domestic crime scenes.

Item Type: Thesis (Masters by Coursework)
Murdoch Affiliation(s): Medical, Molecular and Forensic Sciences
Supervisor(s): Speers, James
URI: http://researchrepository.murdoch.edu.au/id/eprint/59288
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