Hair+project+AF

-secondary transfer-hairs from other surfaces, clothes,carpets, and animal hair -hair offers answers to racial backgrounds or physical characteristics -a follicle of hair gives DNA which is individual evidence, leads to individual identification -hair is trace evidence

Hair-all mammals have hair to keep them warm, regulates body temperature -protect against sunlight, decrease friction, and to act as a sense organ -cold temperatures-small muscles pull hair strands upright which creates pockets that track air -the trapped air provides a warm insulating layer next to the skin -when warm, hair is flattened against body and air is released

Trichology is the study of hair -A forensic examiner just by looking at hair can tell scale patterns, roots, color, length, shaft characteristics and more. -they can tell if hair was "forceably removed, damaged by burning, dyed or bleached, and cut by glass" -can figure out if the person was ill -however a microscopic look cannot tell the owner -people have different hair characteristics - a microscopic exam gives evidence that hair samples are with a certain person -the hair root has to have tissue in order to have DNA to tell of the exact owner

Quiz- http://www.fbi.gov/page2/march05/hair031605.htm

Hair Microscopy- -analayzing hair under a light microscope involves two steps -identifying the hairs and comparing them to the known hairs -to determine whether two or more individuals could have come into contact with one another The Hair examination process: the first step is to determine whether the hair is animal hair or human hair -if animal hair, what animal -the regions of the body that hair is most useful in the crime scene is the head and pubic areas -longer hairs are more important to the crime scene than shorter because they have more characteristics to compare and "the greater variation along the length, the greater the degree of significance" -fingerprints are always the best identification tool -however research has shown that hair from two different individuals is distinguishable