Hair+chapter+LR

Hair can easily be left behind at a crime scene. It can stick to clothes, carpets, and other surfaces. They can also be transfered to other locations. THIS IS CALLED SECONDARY TRANSFER. - secondary transfer is particularly common with animal hair.  Animal hair: has a tough outer coating and is hard to decompose.

By looking at the physical characteristics of the hair can help identify the broad racial background of a person

Another test to help identify an individual are chemical tests. They provide the history of the use of drugs, ad other toxins.

When the follicle of a hair is present, DNA evidence may be gotten. If DNA is analyzed it i not considered class evidence. DNA can help lead to a persons identification... therefore it is called individual evidence.

 Trace evidence is looked as the importance of analysis of hair

When a lot of hair is collected at a scene, they preform a side by side analysis using the comparison microscope. They compare the hairs from a suspect or a victim.

All mammals have hair. Hair helps regulate the body temperature. It insulated the body, keeping it warm.


 http://www.crime-scene-investigator.net/collect.html#3
 * An examination of human hair can occasionally reveal the possible race of the individual from whom it came and the part of the body from which it originated.
 * Human hair can be compared to determine whether or not two samples could have had a common origin. The value of the Laboratory examinations of such specimens will depend upon the amount of hair recovered and the characteristics found in the examinations.
 * Recover all hair present. If possible, use the fingers or tweezers to pick up hair, place in paper bindles or coin envelopes which should then be folded and sealed in larger envelopes. Label the outer sealed envelope.
 * If hair is attached, such as in dry blood, or caught in metal or a crack of glass, do not attempt to remove it but rather leave hair intact on the object. If the object is small, mark it, wrap it, and seal it in an envelope. If the object is large, wrap the area containing the hair in paper to prevent loss of hairs during shipment.
 * In rape cases, the victim's pubic region should be combed prior to collecting standards. Obtain known hair samples from the victim, suspect, or any other possible sources for comparison with unknown specimens. The recommended method for collecting head hairs is to start by having the person from whom they are being collected bend over a large sheet of clean paper, rubbing or massaging their hands through the hair so that loose hair will fall out on the paper. More should then be gathered by plucking them from representative areas all over the head. A total or 50-100 hairs is desired. Do not cut the hair. This same method may be used to collect hairs from other parts of the body. 30-60 pubic hairs are required. When the person is a suspect, hair should be gathered from all parts of the body even though there may only be an interest in hair from the head at that particular time.

 He is comparing 2 hairs --> These hairs are match!