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**Comparing Hairs Found at a Crime Scene**
Hair is encountererd as physical evidence. An hair examination must start with the observsation which is often diffcult to individualize a human hair to a single head or body.(M.S.) classify the hair into it's own orgin, it can be cassified into six different groups:
 * Hair from the scalp tends to have a circular cross-section, often with somewhat split ends.(M.S.)
 * Beard hair often has a more triangular cross-section.(M.S.)