Chapter_5_Hair_Powerpoint

Chapter_5_Hair_Powerpoint - Chapter 5: Chapter Hair For...

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Chapter 5: Chapter 5: Hair Hair “For three days after death, hair and fingernails continue to grow but phone calls taper off.” —Johnny Carson Comedian and television host
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Kendall/Hunt Publishing Company 2 Hair Analysis Hair Analysis hair is class evidence hair can be used to back up circumstantial evidence hair absorbs and adsorbs substances both from within the body and from the external environment   Students will learn:
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Kendall/Hunt Publishing Company 3 Students will be able to: Describe the structure of a hair Explain the difference between human and animal hair Explain which characteristics of hair are important for forensic analysis Assess the probative value of hair samples Hair Analysis Hair Analysis
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Kendall/Hunt Publishing Company 4 Introduction Introduction Human hair is one of the most frequently found pieces of evidence at the scene of a violent crime. It can provide a link between the criminal and the crime. From hair one can determine: If the source is human or animal Race (sometimes) Origin of the location on the source’s body Whether the hair was forcibly removed If the hair has been treated with chemicals If drugs have been ingested
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Kendall/Hunt Publishing Company 5 Skin Structure Skin Structure
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6 Hair Shaft Hair Shaft Composed of: Cuticle —outside covering, made of overlapping scales Cortex —inner layer made of keratin and imbedded with pigment; also
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Chapter_5_Hair_Powerpoint - Chapter 5: Chapter Hair For...

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