Hair/Fiber

Hairs, which are generated mostly of the protein keratin that, can be classified as slender outgrowths of the skin of mammals. Each species of animal possesses hair with distinctive length, color, shape, root form, and internal microscopic features that differentiate one animal from another. Significant variability also exists in the types of hairs that are established on the body of an animal. In humans, hairs found on the head, pubic region, arms, legs, and other body areas have uniqueness that can determine their origin. On animals, hair types include coarse outer hairs or guard hairs, the finer fur hairs, tactile hairs such as whiskers, and other hairs that originate from the tail and mane of an animal.


Because hairs can be transferred at some stage in physical contact, their attendance can link a suspect to a victim or a suspect/victim to a crime scene. The types of hair recovered and the condition and number of hairs found all impact on their value as evidence in a criminal investigation. Comparison of the microscopic characteristics of questioned hairs to known hair samples helps determine whether a transfer may have occurred.


These are 3 main category of hair analysis:

chemical assys used to judge the use of illegal drugs, the existence of weighty metals in the body, and to experiment for nutritional shortage

the core of the hair is normally used for the DNA analyses

microscopic difference if hair can be determined if the hair from another place if they are the same person or animal.

Hair is conceived of 3 coatings
medull
cortex
cuticle

Positioning a suspect at a sight of a crime is what it is all about. 1 of the traditions that this can be done is by finding fabric fibers similar to those from the victim’s clothing or the crime scene on the clothing or person of the suspect otherwise uncovering fiber evidence at the crime scene that can in some way be tracked back to the suspect.

Fibers are regarded as a type of trace evidence that can be transmitted from the clothing of a suspect to the clothing of a victim at some point in the commission of a crime. Textile fibers can also be transferred from rugs or blankets; between two individuals; between an individual and an object or between two objects