FSC239Y5 Lecture : FSC239 Sept 30 2010

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Footwear impression evidence transfer of class and individual characteristics from footwear to surface importance of context. Id of witness o o: ex. location of impression, 2d: dust, dirt prints on floors, 3d: dirt, gravel, snow. 2d and 3d impressions o identify/eliminate footwear presence at scene/participation in crime context establishes significance confirm alibis determining brand and size number of perpetrators association with evidence and other scenes. Steps of evidence processing locating footwear evidence o requires deliberate effort. Recovering evidence electrostatic lifting devices (eslds) useful for lifting 2d impressions simple premise: opposites attract o surfaces are positively charged and the dust particles are negatively charged. Casting impressions especially on carpet in the end you get a 3d recreation of the footprint for comparison. Matching wear patterns is significant evidence of a match but not enough for. Wear comparison may allow the elimination of shoes old shoe will not match identification alone new sole.

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