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بسم الله الرحمن الرحيم

بسم الله الرحمن الرحيم. Who know student ahmed. 1- IDENTIFICATION. Definition : - It is the recognition of a person through certain features which differentiate him from all other persons. - It may be complete or partial. Identification. Search a sample against a database of templates.

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بسم الله الرحمن الرحيم

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  1. بسم الله الرحمن الرحيم prof Kabbash

  2. Who know student ahmed prof Kabbash

  3. 1- IDENTIFICATION • Definition: - It is the recognition of a person through certain features which differentiate him from all other persons. - It may be complete or partial. prof Kabbash

  4. Identification • Search a sample against a database of templates. • Typical application: identifying fingerprints ? prof Kabbash

  5. Verification (prove) • Compare a sample against a single stored template. • Typical application: voice lock ? prof Kabbash

  6. 1- IDENTIFICATION • Complete identification Absolute fixation of the individuality or a person. • Partial identification Ascertainment of only some facts (race. Sex. Age, stature) while others remain still unknown. prof Kabbash

  7. Types of identification: 1- Legal identification: It is complete description of an unknown dead body in order to know the identity of this person later on. ) explosion, travel accidents, decomposed bodies, mutilated bodies ( prof Kabbash

  8. Types of identification 2- Personal identification. 3- Criminal identification 4- Civil identification. prof Kabbash

  9. Methods of identification: 1- Anthropometry 2- Portraite parledescriptive (eye – hair – scar – skin color) 3- Photographs: prof Kabbash

  10. Methods of identification: 4- Dactylography (Finger prints): • Definition • Types (arches –loops - whorls - composite) • Finger prints are transiently lost (radiation) • Permanently lost • Poroscopy: prof Kabbash

  11. Fingerprints( loop) prof Kabbash

  12. Fingerprint with blood prof Kabbash

  13. Distorted fingerprint prof Kabbash

  14. Methods of identification: 5- Palm prints: 6- Foot prints: In maternity hospital to guard against mixing of infants (common). 7- Lip prints: prof Kabbash

  15. Other recent prints • Iris prints . • Voice prints. • D.N.A. Prints prof Kabbash

  16. Iris Scan • Image Acquisition  Image Processing  • Template Creation  • Template Matching • Uses to date: • Physical access control • Computer authentication prof Kabbash

  17. Iris Scan: SWAD • Strengths: • 300+ characteristics; 200 required for match • Weaknesses: • Fear • Discomfort • Availability of device • No large databases (very important in forensic practice) • Attacks: • Surgery (Minority Report ) prof Kabbash

  18. Voice: SWAD • Strengths: • Most systems have audio hardware • Works over the telephone • Can be done in secret illegal money gain. • Weaknesses: • Background noise (airplanes) • No large database of voice samples. • Attacks: • Tape recordings. • Identical twins / soundalikes prof Kabbash

  19. D.N.A. Prints: • Definition • Structure • Samples needed • Applications prof Kabbash

  20. prof Kabbash

  21. Report on unknown body. 1- Clothes 2- Features: Color of skin- eye- hair, shape of mouth, 3- Other characters: Age, sex, race, stature, social occupation, cause of death and time pass since death. prof Kabbash

  22. prof Kabbash

  23. prof Kabbash

  24. Estimation of age • Teeth • Bones • General features (approximate) Around the fifth decade. prof Kabbash

  25. ML importance of age Estimation • Civil cases: e.g. marriage, full civil rights, elections . • Criminal cases: e.g. for criminal responsibility as well as age of consent in rape. prof Kabbash

  26. Teeth • Milk teeth small – non cusped • 6 to 24 month • Permanent teeth large – cusped prof Kabbash

  27. Medico legal significance of teeth: 1- Age estimation: 2- Establishment of personal identity 3- Differentiate between human and animal bite. 4- Diagnosis of poisoning prof Kabbash

  28. Diagnosis of poisoning: • Lead Blue line on the gums • Mercury Gray line on the gums. • Copper: Green line on the gums. • Cadmium: Yellow line on the gums. • Bismuth: Black line on the gums. • Arsenic: As is deposited in teeth enamel and can be detected chemically. prof Kabbash

  29. Less than 21 years in males

  30. 20 14 15 17 16

  31. prof Kabbash

  32. 17 16 20

  33. metatarsal prof Kabbash

  34. 13 -15 23 6 21 prof Kabbash

  35. 40 25-30 3 50

  36. Sternum Manubrium unites with the body: 60 years - Xiphoid process unites with the body 40 years prof Kabbash

  37. N.B.: • All the above mentioned figures are for males, • in females union occurs earlier by 2 years. prof Kabbash

  38. Some ages of medico legal importance • Age of 6 years: • Age of 7 years: Age of discrimination • Age of 14 years: • Age of 18 • Age 21 • Age of 60 prof Kabbash

  39. Sex Identification • Evidences of sex is divided into: • The most certain evidence • The highly probable evidences • The presumptive evidences prof Kabbash

  40. Intersex states: 1- Gonad agenesis . 2- Gonad dysgenesis. 3-Hermaphrodite : prof Kabbash

  41. Pesticide induced gonadal abnormalities (intersex) Ovaries Testes prof Kabbash

  42. mixed gonadal dysgenesis prof Kabbash

  43. Female (46XX) with congenital adrenal hyperplasia prof Kabbash

  44. Hermaphrodite a- true hermaphrodite b- false (pseudo) hermaphrodite is either: i- Male masculine or testicular hermaphrodite ii- Female feminine or ovarian hermaphrodite prof Kabbash

  45. Intersex prof Kabbash

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