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There are two deltas, and if a line is drawn between them, no ridges in the inner pattern Figure 6-8. Death might also be defined as the cessation of all brain activity. Indicate which of these blood-spatter patterns (Sample A, B, C, or D) represents bleeding from: a. a bullet wound that caused bleeding as the bullet entered the body and as the bullet passed through the body of one individual b. two separate instances of bleeding, possibly from two different individuals c. a single wound from one individual d. a change in position of a victim after a wound has been inflicted 2. 2 A crime has been committed. 8 9 10 R. Cook, M. T. Webb-Salter, and L. Marshall. Forensic Anthropology: What We Learn from Bones 375 CHAPTER The bones and teeth helped. The police sent the trace evidence of pollen to the crime lab. Obj. 8. ©Robert Brocksmith/SPL/ Photo Researchers paralyzing muscles by blocking the release of the neurotransmitter acetylcholine. 558 Capstone Projects 8. And it never fails to convince me that each one of us is a miracle. Match bite marks found on a victim with bite marks from a suspect. d. How big is pollen? M A TE R I A L S : ( p r o v i d e d b y yo u r in s t r u ct o r ) • Landmark Cases in Acceptance of Evidence Form • Technology and Evidence Analysis Form P RO C E D U R E 1. Further Study: Research the Washington, D.C. sniper case mentioned at the beginning of the chapter. If you want to determine the point of origin, or height from the impact surface, you will need to make some calculations. How accurate was Figure 15-9? 3 4 5 6 Y axis 7 8 9 X axis 10 BLOOD SPATTER TYPES 11 Blood spatter may also be classified by its speed or velocity on impacting a surface (Figure 8-21). Describe some examples of poor laboratory techniques involved in a blood-typing analysis that might produce erroneous results. 6. Obj. Her body was never recovered. 7. Confirm the blood is human. Repeat steps 1 through 7 for location 2 evidence plastic bag. DNA fragments of different sizes are separated as the smaller DNA fragments move easily from the negative end of the gel toward the positive end of the agarose gel (Figure 7-3). The seeds of gymnosperms, the oldest seed plants, are exposed to the outside and are not enclosed in a protective chamber like the angiosperms. This information can be used when an investigator needs to analyze hair for the presence of different toxins, drugs, or metals at specific points in time. b. New York: Gould Publications, a division of LexisNexis, 1991. It was positively matched to dental records of Helle Crafts. Mounts Adhered with Heat or Solvents: Dry mounted parchment that is reasonably strong and healthy, and not weakened by mold, has been successfully treated using mechanical tech-niques. The normal is the line that is Obj. You must credit any picture or photo by copying the address of the source or citing where you obtained the picture or photo. • A man with a heart condition is attacked and dies from a heart attack during the assault. Someone in your team could bite into a slice of American cheese to provide the evidence bite mark. Make your own investigation by reading the primary sources available on the Web site. Use the Law of Tangents to determine the point of origin or the height of the source of blood for droplet 3. He’s forthright about his reasons. 1. t:lb, AMERICAN ACADEMY 8. Fingerprints 139 CHAPTER Figure 6-13. 9. Examples of stimulants include amphetamines, methamphetamines, and cocaine (including crack), and are highly addictive. 12.2 6. (a) Wiper marks in a windshield. In all of these cases, the mutilation was discovered by law enforcement. Eventually, the esteemed chemist, Walter McCrone, tested a sample of Napoleon’s hair. Refill the beaker to just overflowing. NONE of those fun and simple tests you see on the Internet are reliable tests of unadulterated honey. The head of the crime scene lab was not satisfied with the quality of the photographs of the hammerheads. These same techniques can be used to age missing persons and criminals who are still at large. Fibers are an excellent source of trace evidence because Obj. • Detectives look for leads by interviewing witnesses and talking to the crime-scene investigators about the evidence. Refer to the title: DNA Interactive. Can you provide a cause of death? Other seals are affixed to other denominations in the same position. He took the bloody doorpost and fingerprint samples of Pedro Velásquez (Figure 6-18) to Juan Vucetich, who in late 1891 had opened the first fingerprint bureau in South America in Buenos Aires. Explain your answer. Design an experiment involving a television or print commercial that demonstrates how different factors influence one’s ability to observe. 5 TREATED HAIR 6 13 Hair can be treated in many different ways (Figure 3-9). About 20 percent of untreated cases of cutaneous anthrax result in death. 5. Obtain two equally sized Styrofoam plates from your instructor. Background: As the expert in pollen analysis, you are called as an expert witness for the prosecutor’s office. Blood and Blood Spatter ACTIVITY 8-3 Ch. causing 9.4 Discuss ag ents that may be used in bioterro 9.5 Define and rism. The harder surface leaves scratch marks or striations on the softer surface.
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