Fibers

1
Fibers

• Nature of Fiber Evidence
• Collection and Packaging
• Laboratory Examination

2
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.

3
Nature of Fiber Evidence

• Natural fibers
• Plant fibers
• Mineral fibers
• Animal fibers
• Synthetic fibers
• Man-made materials
• Derived or regenerated fibers

4
Collection of Fibers

• Manual collection
• Vacuum
• Tape lift
• Mechanical dislodgement

5
Packaging Fibers

• Vacuum
• Druggist Fold
• Clothing

6
Laboratory Examination

• Physical match
• Microscopic examination
• Microchemical tests
• Determination of Physical Properties
• Polarized light microscopy
• Instrumental methods