hair 2

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  • Hair
    • recovery of hair
      • transient evidence
        • collect immediately as hair is easy to loose
      • tweezering
      • tape-lifting
      • vacuuming
      • combing
      • brushing
      • scraping
      • shaking
      • clipping/plucking
    • preparation
      • initial mounts should be in water
      • identify if hair has an anagen root for DNA analysis
      • hair covered in debris/blood/other substance then gently clean using distilled water
    • analysis
      • initial macroscopic observations
        • colour, root presence, shaft profile, length, tip, condition.
      • microscopic analysis (x400)
        • sketches
        • using hair chart
      • comparison
    • mounting a hair
      • 1. place approx 1cm diaeter of depex in centre of slide
        • 2. with tweezers place hair into depex
          • 3. make sure all of the hair is immersed
            • 4. place cover slip on top of depex
              • 5. should allow 24 hours to dry
    • documentation
      • three sketches- root, shaft, tip
      • large
      • in pen
      • annotated
      • signed
    • variation factors
      • regional
        • caucasoid
        • negroid
        • mongoloid
      • disease/damage
        • pilli torti
        • lice
        • debris

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