Essay On Hair Evidence

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Hair Evidence in Forensic Science

Hair is an important part of our body. It can be found anywhere and can be a useful evidence in forensic science. It consists of three layers, namely cuticle, cortex and medulla. Cuticle- is a covering that consists of hard scales made of keratin, which is a protein approaching tip ends of the hair. There are three types of cuticle: coronal, imbricated and spinous types. Cortex consists of stretched out beam shaped cells, buried with pigment granules for hair to cede with color and is the main body of the hair shaft. It may also contain pigment granula, ovoid bodies and cortical fusi (Wright, 2008). Furthermore, medulla can be categorized into continuous, fragmental, absent and interrupted types. If medulla
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Strands of human hair situated at the crime scene gives exceptionally solid sign that an individual was at that area, yet it can likewise be useless if the fibres were found outside and, subsequently subject to the elements such as wind, and if the full length of the strand is not present (Dasgupta, 2007). Hair without anyone else 's input is essential, but rather the most imperative DNA evidence connected with hair fibres originates from the cellular material at the root of the hair strand. In a way, the microscopic particles of follicle give the most solid proof. The protein called keratin is the key substance that goes with the follicle, and that gives the best distinguishing proof. On the off chance that the hair is taken off by the root, for example that could happen when an individual is guarding him or herself against an attacker, then the hair fibres are essential (Innes, 2000). Hair that does exclude follicular material is a great deal less dependable. Hair fibres that do exclude keratin are helpful in distinguishing a category of individual into which a suspect may fit, however they are not complete evidence that the hair originated from the suspect (Innes, 2000). Therefore, personally, hair fibres are less important than fingerprints and DNA evidence acquired from saliva or blood. Fingerprints are not DNA evidence, but still they are extremely dependable types of evidence. DNA obtained from bodily fluids, in any case, is the most profitable type of evidence

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