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Trace Evidence: Hair
| Question | Answer |
|---|---|
| Trace evidence | any very small physical material that can be transferred from person to person or between a person and a crime scene. Ex. hair, fibers, pieces of glass, chips of paint, dirt. |
| Why are hairs trace evidence? | the hair itself contains many toxins (like arsenic) and you can extract DNA from the follicle. |
| Cortex | the largest portion of the shaft giving you the hair color that you have, the interior of the hair |
| Cuticle | the layer of cells that cover the surface of the shaft and looks like scales on a fish or even roofing tiles. Outside covering of the hair. |
| Medulla | is a collection of cells which appear as a canal running though the center of the hair |
| Medullary index | the width of the medulla relative to the overall width of the hair |
| Hair Follicle | Hair is an appendage of the skin that grows out of a structure known as the |
| Hair Root | The part of the hair that is embedded in the hair follicle. |
| Hair Shaft | is composed of the cuticle, cortex, and medulla and is subjected to the most intense examination by the forensic scientist. |
| Upon finding hair at a crime scene, the first thing to be done is an examination in a crime laboratory to establish whether the hair originates from | a human or animal |
Created by:
TBrylewski
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