footwear impressions 3

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  • Examining Footwear Impressions
    • examine item for marks
      • photograph
        • recover
          • enhance
            • further notes
    • examine suspect shoes
      • photograph
        • sketch
          • make test prints
            • test subject with similar size
            • powdering, adhesive lift acetate sheet, gel lift
            • label appropriately
      • make notes
        • general description
          • brand
          • model
          • colour
          • labels
            • size ad country of manufacturer
          • condition
          • sole pattern
          • flat slopped or stepped heel
          • wear and damage to sole
      • preserve other evidence type before full examination commences
    • characteristics
      • class
        • make
        • model
        • design
        • size
      • individual
        • wear
          • pattern elements become worn
            • appear on well worn shoes
              • ridge characteristics - change will occur rapidly
        • tear
        • damage
          • random features on the sole
            • lines, cuts or gouges
    • patterns
      • large number of patterns on databases
        • mostly training shoes
        • many old and no longer in use
      • manufacturers change patterns regularly
      • nike, reebok and adidas most common
    • pattern size
      • overall length and width
      • similar shoes may have the same size of sole
      • difficult to predict exact size even if whole of the pattern is present
    • comparison
      • after examination of both crime scene mark and suspect shoe
        • over lay test prints
          • use different light sources and magnification
          • refer back to original mark and shoes
      • limitations
        • time consuming
      • compare pattern, pattern size, wear and damage
        • provides conclusion
          • no support, limited support, moderate support, moderately strong support, strong support, very strong support and conclusive
    • elimination prints
      • paramedics, first officer attending scene, fire service and legitimate access

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