The purpose was to use microscopy to identify natural hair, synthetic, and other types of fiber. For the procedure, we placed the type of hair under the microscope. Observe the type and whether its the unknown or something else. We observed:
1. Black Male Hair
2. White Male Hair
3. Synthetic
4. Asian Hair
5. Color Treated
6. Dog Hair
7. Cat Hair
We sucessfully found out that the unknown was male hair.
When crime scenes take place investigators use hair and fiber to identify the suspect(s) of the crime. Since hair is considered a class characteristic, it is regarded as contributing evidence and can be used to exclude a suspect. Hair samples are collected from several parts of the body and typically contain approximately a minimum of 25 strands. Hair analysis can help determine the origin of the source as either human or animal. If the hair sample is from a human source, the race of the individual can be determined through hair analysis. A follicular tag or piece of skin, at the root of the hair is a rich source of DNA. One of the ways cross-transfer of fibers occurs is via person-to-person contact. Fibers are considered a class characteristic. The three categories of fibers include:
1. natural (i.e. wool or cotton)
2. manufactured/ synthetic (i.e. rayon or polyester)
3. man-made combinations of natural and synthetic fibers (nylon).
This type of trace evidence is collected at a crime scene with tweezers, tape or a vacuum and brought back to the laboratory for microscopic comparison.
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