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Questions and Answers
What is the smallest unit of a textile?
What is the smallest unit of a textile?
fiber
What synthetic fiber is strong and used in many apparels and home furnishings?
What synthetic fiber is strong and used in many apparels and home furnishings?
Polyester
Fibers are considered to be what kind of evidence?
Fibers are considered to be what kind of evidence?
Class
What method of synthesizing long-chained molecules has led to the creation of synthetic fibers?
What method of synthesizing long-chained molecules has led to the creation of synthetic fibers?
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What is a method of removing a fiber from a crime scene?
What is a method of removing a fiber from a crime scene?
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What is a fiber that is manufactured or created in a laboratory called?
What is a fiber that is manufactured or created in a laboratory called?
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What fibers are wholly derived from plants, animals, or minerals?
What fibers are wholly derived from plants, animals, or minerals?
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What is the name of the forensics test that helps to identify unknown fibers?
What is the name of the forensics test that helps to identify unknown fibers?
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What is the tabby weave pattern characterized by?
What is the tabby weave pattern characterized by?
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What tool allows forensic scientists to view color and diameter characteristics of a fiber?
What tool allows forensic scientists to view color and diameter characteristics of a fiber?
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What is a natural fiber obtained from sheep called?
What is a natural fiber obtained from sheep called?
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What is an example of a natural fiber?
What is an example of a natural fiber?
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Who was convicted of the 1980 Atlanta child murders through fiber evidence?
Who was convicted of the 1980 Atlanta child murders through fiber evidence?
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What is the herringbone pattern?
What is the herringbone pattern?
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What device is used to observe and identify fiber evidence in forensics?
What device is used to observe and identify fiber evidence in forensics?
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In what way is fiber evidence classified?
In what way is fiber evidence classified?
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What is one of the three types of natural fibers?
What is one of the three types of natural fibers?
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What type of fiber transfer occurs when a fiber moves from a source to a person or object?
What type of fiber transfer occurs when a fiber moves from a source to a person or object?
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What type of weave pattern is characterized by a weft woven over three or more warps and then under one?
What type of weave pattern is characterized by a weft woven over three or more warps and then under one?
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What test allows fines to be analyzed, but only if there are multiple fibers of the same type?
What test allows fines to be analyzed, but only if there are multiple fibers of the same type?
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What type of transfer occurs when fiber evidence moves from a source to a person/object and is then transferred to another person/object?
What type of transfer occurs when fiber evidence moves from a source to a person/object and is then transferred to another person/object?
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What is categorized as a regenerated fiber that is made of polymers?
What is categorized as a regenerated fiber that is made of polymers?
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What is a method of collecting fiber evidence from a crime scene or victim?
What is a method of collecting fiber evidence from a crime scene or victim?
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What is a flexible flat material made by interlacing threads or fibers called?
What is a flexible flat material made by interlacing threads or fibers called?
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Study Notes
Fiber Fundamentals
- The smallest unit of textile is known as a fiber.
- Fibers play a crucial role in forensic investigations, being categorized as class evidence.
- Synthetic fibers, such as polyester, are strong and commonly used in apparel and home furnishings.
Synthetic vs. Natural Fibers
- Synthetic fibers are laboratory-made and produced through the synthesis of long-chained molecules called polymers.
- Natural fibers are derived entirely from plants, animals, or minerals, with examples including wool (from sheep) and cotton.
Forensic Techniques
- Fiber burn analysis is a forensic method that helps identify unknown fibers.
- A visible light microspectrophotometer is a tool used to examine the color and diameter characteristics of fibers.
- Microscopes are vital devices for observing and identifying fiber evidence in forensic contexts.
Weave Patterns and Characteristics
- The tabby weave pattern consists of two or more warp threads and weft threads, with each weft crossing over and under the warp.
- Twill weave is characterized by a weft woven over three or more warps and then under one.
- Herringbone pattern refers to a cross pattern visually analyzed, associated with backward lead foil film.
Fiber Transfer and Classification
- Fiber transfers can be direct (from source to person/object) or secondary (transferred from one object/person to another).
- Fiber evidence is classified as class evidence, providing essential links in forensic analysis.
- The analysis of fines in forensic science can be conducted using a burn test, especially when multiple fibers of the same type are present.
Collection Methods
- Adhesives serve as a method for removing fibers from crime scenes or victims, ensuring evidence is preserved for analysis.
Notable Cases
- Wayne Williams was convicted of the 1980 Atlanta child murders, primarily using fiber evidence collected at the crime scenes.
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Description
Test your knowledge on the fundamentals of forensic fibers. This quiz covers key terms, definitions, and the role of fibers in forensic science, including synthetic fibers and their classifications. Perfect for students studying forensic science or related fields.
