PPT-Trace Evidence I: Hairs and Fibers

SFS2 Students will use various scientific techniques to analyze physical and trace evidence b Analyze the morphology and types of hair fibers soil and glass SFS1 Students will recognize and classify various types of evidence in relation to the definition and scope of Forensic Science . Training for Cub Scouts . A nationally recognized outdoor skills and ethical awareness program. CUB SCOUTS. Leave No Trace is a plan that helps you to be more concerned about your environment. It also helps you protect it for future generations. Tony Hoare. Ian Wehrman . Traces. Trace: set of events + dependency relation. an execution of a program. tr. Trace Separation. W. eak separation . (*). tp. * . tq. . =. . tp. U . tq. . . when . 2. Fibers. Are considered class evidence. Have probative value. Are common trace evidence at a crime scene. Can be characterized based on comparison of both physical and chemical properties. . Identification . Hairs. Human Hair Is . Class. Evidence. Asian. European. African. Human Hair As Class Evidence. Can often determine body area of origin. Can determine shed vs. forcibly removed. Can often determine racial origin. Post-Silicon . Debug. Min Li . and . Azadeh. Davoodi. Department of Electrical and Computer Engineering . University of Wisconsin-Madison. . W. ISCAD.  . Electronic Design . Automation Lab. Are considered class evidence. Are common trace evidence at a crime scene. Can be characterized based on comparison of both physical and chemical properties . Fabric. Fabric is made of fibers. . Fibers are made of twisted filaments called yarn.. Ms Clark, 2014. PVMHS. Hair evidence. What information can be gained from analysis of hair?. Hair alone (without follicle cells) is . trace evidence . & . class evidence. .. It does not identify a specific individual, but can narrow your suspects down based of certain characteristics of their hair.. Evidence. Human hair is one of the most frequently . found. pieces of evidence at the scene of a violent crime. Unfortunately, hair is not the best type of physical evidence for establishing . identity. Hair. NS2232 - Littlefield. Trace Evidence--any small pieces of material, man-made or naturally occurring. Most common examples:. Hair. Fiber. NS2232 - Littlefield. Questions for Trace Evidence. What is it?. H. umphreys. What Is Trace Evidence?. Trace evidence is the materials or markings that are left behind when different objects or materials come into contact with one another.. This usually occurs due to friction.. Can only compare head hair to head hair. or . pubic hair to another pubic hair. Control hairs from suspect:. 50 full length head hairs. minimum of 24 pubic hairs. HAIR . is useful as forensic evidence because its protein polymers are…. Can only compare head hair to head hair. or . pubic hair to another pubic hair. Control hairs from suspect:. 50 full length head hairs. minimum of 24 pubic hairs. HAIR . is useful as forensic evidence because its protein polymers are…. Hairs and Fibers. FORENSIC SCIENCE: An Introduction by Richard Saferstein. 1. Introduction. Hair. is encountered as . physical evidence. . in a wide variety of crimes.. Although it is not yet possible to individualize a human hair to any single head or body through its morphology, it still has value as physical evidence.. Chapter 10. Trace Evidence. A category of physical evidence which includes any small pieces of material, man-made or naturally occurring. Most common examples:. Hair. Fiber. Forensic Use of Hair. Although it is not yet possible to individualize a human hair to any single head or body through its morphology, it still has great value as physical evidence..