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By S Al- Shokair

College of Veterinary Medicine & Animal Resources Department of Clinical Studies Toxicology & Forensic Medicine . Hair and fibers . By S Al- Shokair. Hair. Introduction.

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By S Al- Shokair

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  1. College of Veterinary Medicine & Animal Resources Department of Clinical Studies Toxicology & Forensic Medicine Hair and fibers By S Al-Shokair

  2. Hair

  3. Introduction

  4. Examination of hair is a considerable help in criminal investigation. When a material, alleged to be a hair is given for medical examination determine the following:

  5. Diagram of Skin

  6. How to remove hair? 1. Use blunt foreceps (blood, semen, stains, fat or oil). 2. put in a clean test tube. 3. Seal and write all information including the crime place. 4. Take standard hair by force .

  7. 1.Is it natural hair or synth or fibers? 2. Is it human hair or animal hair? 3. What parts of the body it belongs to? 4. What is the sex and age of the person to whom the hair belongs? 5. Did the hair fall naturally, or was it forcibly removed? 6. If it had been cut, was the instrument blunt or sharp?

  8. The answer to these Questions are determined by subjecting the hair to the following examinations.

  9. Hair examination

  10. Physical examination

  11. Hair affected by burning

  12. Chemical examination

  13. Microscopic examination

  14. Cross section of a hair shaft

  15. Types of human medulla

  16. Microscopic examination

  17. Human hair

  18. Animal hair

  19. Medicological importance of hair

  20. 1. To know the criminal preson (rape, rubbery) DNA.

  21. 2. Car accidents.

  22. 3. Sex

  23. Stained sex chromatin in the nuclei of human cells showing the female-indicative Barr body (bright spot, left) and the male-indicative Y body (bright spot, right)

  24. 4. Age

  25. 5. Drug abuse, doping

  26. Expected concentration ranges in hair of drug users COMPOUND ng/mg hair Cocaine 0.1 – 28.9 Cocaethylene 0 – 2.6 Benzoylecgonine 0 – 4.4 Ecgoninemethylester 0 – 4.4 Heroin 0 – 16 6-Monoacetylmorphine 0.1 – 67 Morphine 0.1 – 10 Codeine 0 – 4.2 Methamphetamine 3.1 – 126 Amphetamine 0.8 – 12 Cassani M, Spiehler V. (1993) Analytical requirements, perspectives and limits of immunological methods for drugs in hair. Forensic SciInt63, 175–184.

  27. 6. Race (White, African or Asian)

  28. Racial characteristics of hair. Reference: Bisbing, Richard E., in Saferstein, Editor, Forensic Science Handbook, Vol. 1, 2nd Ed., Prentice Hall, 2002.

  29. Caucasian or European hair Mongoloid or Asian hair Negroid or African hair

  30. 7. Location of the hair (head, pubic, axillary) Secretion.

  31. Human hair

  32. A split hair Axillary hair A hair showing buckling-pubic hair

  33. 8.In case of wounds

  34. A razor-cut hair A hair with a cut tip

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