Forensic Characterization of
Animal Fibers
Forensic science(과학수사)
Forensic science has been evolving science the beginning of crime.
Sir Arthur C. Doyle is often believed to have popularized forensic investigation with his 1887 publication on Sherlock Homes.
Today investigators are able to use the smallest amount of trace
evidence such as dust and fibers to gather information and facts about a crime or an object’s history.
For example, unusual textile fibers from a carpet, furniture or clothing can be used to place a victim or suspect at a particular location.
Fiber identification can be used to reveal an exchange between two people, a person and an object or even between two objects.
The knowledge of such an exchange can lead to the arrest of a guilty suspect or to the release of an innocent one.
수모섬유
양모섬유의 구조
Measurement of diameters
양모단면과 표면 스케일
Hair의 Identification
Hair의 기본구조
동물의 털 감별은 형태학적인 구조를 분류함으로써 가 능하게 되었으며, 단면모양, 스케일의 패턴 및 메듈라의 형태로 감별이 이루어진다.
Scale의 형태분류
[보관형]
Hair의 Identification
[비늘형]
1) 물결형
2) 모자이크형
Hair의 Identification
[비늘형]
3) 꽃잎형
Hair의 Identification
[비늘형]
4) 산모양형
5) 기타
Hair의 Identification
Medula 의 형태분류
Hair의 Identification
단면의 형태분류
Hair의 Identification
a. Identify of hair fiber, specifically hair from humans, cats and dogs.
Experimental
Forensic Analysis of
Unidentified textile fibers ,
dust accumulations
a. Collect a group or cluster of unidentified fibers from behind or under some furniture at your house or dorm room. If this is not possible then examine what is collected in a home vacuum cleaner. Other “dust”
materials are probably in the sample in addition to fibers.
b. Separate the fibers using tweezers.
c. Group similar fibers.
d. Perform the following tests to identify the unknown fibers: Longitudinal & Cross- sectional microscopy
e. Identify three different type of fibers in your sample and deduce their possible source.
Experimental
“Hair, fibers, crime, and evidence”, Douglas W. Deedrick, Forensic Science
Communication, July 2000, Federal Bureau of Investigation, Washington, DC.
http://www.fbi.gov/about-us/lab/forensic-science- communications/fsc/july2000/deedric4.htm
“The man who solves the world’s biggest mysteries”, Colin Grey, June 6, 2000, The
Ottawa Citizen. Check sources as Microtrace:
In the News.
