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4-1 History of Hair Analysis

4-1 History of Hair Analysis. Chapter 4: The Study of Hair. Homework Questions. Why is hair considered class evidence? What can change the classification of hair as evidence? What are the functions of hair?. Hair at the Crime Scene. Hair is considered class evidence.

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4-1 History of Hair Analysis

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  1. 4-1 History of Hair Analysis Chapter 4: The Study of Hair Sanders

  2. Homework Questions • Why is hair considered class evidence? • What can change the classification of hair as evidence? • What are the functions of hair?

  3. Hair at the Crime Scene • Hair is considered class evidence. • It is also easily shed and left behind.

  4. Class Characteristic • Hair is a character shared by all mammals. • Hair has many purposes.

  5. Hair Trace Evidence I: Hairs and Fibers

  6. Individual Evidence • If a follicle is present, then DNA can be taken from the cells present. • The follicle is made of cells.

  7. Healthy Hair Trace Evidence I: Hairs and Fibers

  8. Hair first used as trace evidence in 1847 in solve the murder of Duchesse de Praeslin. Her hair was found on the Duke’s pistol. History of Hair Analysis Trace Evidence I: Hairs and Fibers

  9. Principles of Practice of Medical Jurisprudence • Alfred Swaine Taylor and Thomas Stevenson wrote a text in 1883 describing human hair.

  10. Le Poil de l’Homme et des Animaux • Hair of Man and Animals published in 1910. • Included microscopic studies of hair.

  11. Function of Hair • Hair on a mammal is for • Temperature regulation • Reducing friction • Protection from light • A sense organ

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