Fibers Nature of Fiber Evidence Collection and Packaging

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Presentation transcript:

Fibers Nature of Fiber Evidence Collection and Packaging Laboratory Examination

Fibers Fibers are among the most common type of trace evidence. Fibers are often transferred to clothing, shoes, and other physical evidence when an individual or object comes in contact with a fabric or fiber source.

Nature of Fiber Evidence Natural fibers Plant fibers: Mineral fibers: Animal fibers: Synthetic fibers Man-made materials Derived or regenerated fibers

Collection of Fibers Manual collection: Vacuum: Tape lift: Mechanical dislodgement:

Packaging Fibers Vacuum: Druggist Fold: Clothing:

Laboratory Examination Physical match: Microscopic examination: Microchemical tests: Determination of Physical Properties: Polarized light microscopy: Instrumental methods: