Questions and Answers
What is the smallest unit of a textile?
fiber
What synthetic fiber is strong and used in many apparels and home furnishings?
Polyester
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?
Signup and view all the answers
What is a method of removing a fiber from a crime scene?
Signup and view all the answers
What is a fiber that is manufactured or created in a laboratory called?
Signup and view all the answers
What fibers are wholly derived from plants, animals, or minerals?
Signup and view all the answers
What is the name of the forensics test that helps to identify unknown fibers?
Signup and view all the answers
What is the tabby weave pattern characterized by?
Signup and view all the answers
What tool allows forensic scientists to view color and diameter characteristics of a fiber?
Signup and view all the answers
What is a natural fiber obtained from sheep called?
Signup and view all the answers
What is an example of a natural fiber?
Signup and view all the answers
Who was convicted of the 1980 Atlanta child murders through fiber evidence?
Signup and view all the answers
What is the herringbone pattern?
Signup and view all the answers
What device is used to observe and identify fiber evidence in forensics?
Signup and view all the answers
In what way is fiber evidence classified?
Signup and view all the answers
What is one of the three types of natural fibers?
Signup and view all the answers
What type of fiber transfer occurs when a fiber moves from a source to a person or object?
Signup and view all the answers
What type of weave pattern is characterized by a weft woven over three or more warps and then under one?
Signup and view all the answers
What test allows fines to be analyzed, but only if there are multiple fibers of the same type?
Signup and view all the answers
What type of transfer occurs when fiber evidence moves from a source to a person/object and is then transferred to another person/object?
Signup and view all the answers
What is categorized as a regenerated fiber that is made of polymers?
Signup and view all the answers
What is a method of collecting fiber evidence from a crime scene or victim?
Signup and view all the answers
What is a flexible flat material made by interlacing threads or fibers called?
Signup and view all the answers
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.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
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.
