In forensics class we are currently talking and observing hairs and fibers. We discussed how hair is encountered to be physical evidence in a variety of crimes. First you would need to observe the human hair, which is very difficult to individualize on a single head or body. Now if the hair is removed then there will be blood or skin at the root, which DNA testing can be performed. If a hair is properly collected at a crime scene, it can provide strong evidence for placing a person at a crime scene. hair is an appendage of the skin that grows out of a structure, known as the hair follicle. The length of a hair extends from the root and continues into a shaft and subjected to the most intense examination by forensic scientist. Most hair observations, with the help of the cuticle, can be performed with a microscope.