hair writeup

hair writeup - Jason Lim Hair Lab Write Up October 29, 2010...

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Jason Lim Hair Lab Write Up October 29, 2010
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Hair plays a vital role in forensics because it is able to tell various information depending on the state of the hair. At a crime scene, there could be an abundance of hair present, but it is necessary for investigators to sort out which ones are relevant to the case. When dealing with hair collection, investigators must collect hair samples from everyone and everything that could have possibly been at the crime scene. After the hair samples are collected, scientists can determine whether the hair is human or not by analyzing the cuticle scales, the root, and the cross-sectional shape. Once the analyzed hair is determined to be from a human, scientists determine how the hair came out and where it originated from on the body. Scientists look for specific physical characteristics of the hair, such as the diameter, hair color, and length. Examining the medulla's presence and its index, pattern, and type can also exclude suspects. With new recent DNA tests, hair can be tested for mitochondrial DNA found in the hair shaft and nuclear DNA if the root is present. In the court room, hair evidence without DNA can be used to further establish the likeliness that a suspect committed the crime, but it cannot directly label the suspect as the perpetrator. http://www.enotes.com/forensic-science/hair-analysis http://www.ehow.com/facts_5491301_importance-animal-hair-solving-crimes.html http://www.exploreforensics.co.uk/hair-and-fibres.html http://www.crimeandclues.com/index.php/physical-evidence/trace-evidence/63-trace-evidence-hair
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One case involving the use of hair evidence was the Robert Yates Jr. case. From the 1997 to 2000, Yates murdered over ten women in Spokane, Washington. The common characteristics of the women killed were that they had been shot by the same caliber gun, and were at one point engaged in
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hair writeup - Jason Lim Hair Lab Write Up October 29, 2010...

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