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Fingerprint Test Review

Fingerprint Test Review

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Fingerprint Test Review

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  1. Fingerprint Test Review

  2. Topics on Your Test! • Identify types of fingerprints left at a scene based upon description • Latent, plastic, visible • Chemical development techniques • Superglue, Silver Nitrate, Iodine, Ninhydrin • Which technique is best for different surfaces • Identify general ridge pattern • Whorl, Loop or Arch • Identify minutiae • Compare prints to determine if they are the same or different and give explanation to your determination • Primary Classification • AFIS

  3. What is the study of fingerprints?

  4. Dactyloscopy is the study of fingerprints.

  5. When do fingerprint ridges form?

  6. In the womb approximately 10.5 weeks estimated gestational age. It is thought that the movement of the fetus is what contributes to the unique ridge characteristics.

  7. What is the first fundamental principle of the fingerprint system?

  8. First Principle: A Fingerprint is an Individual Characteristic; No two fingers have yet been found to possess identical ridge characteristics.

  9. How is the individuality of a fingerprint determined?

  10. This individuality of a fingerprint is not determined by its general shape or pattern but by a careful study of its ridge characteristics, also known as minutiae.

  11. Will a fingerprint change during the life of an individual?

  12. Second Fundamental Principle of Fingerprints: A Fingerprint will remain unchanged during an individual’s lifetime.

  13. What is the third fundamental principle of the fingerprint system?

  14. Third Principle: Fingerprints have general ridge patterns that permit them to be systematically classified. All fingerprints are divided into three classes on the basis of their general pattern: Loops, Whorls, and Arches.These three classes form the basis for all 10-finger classification systems.

  15. Definitions of Ridge Characteristics

  16. What is the point at which a friction ridge ends or begins?

  17. Ridge Ending

  18. What is a friction ridge that diverges or “forks”?

  19. Bifurcation

  20. What is a very small portion of a friction ridge?

  21. Dot

  22. What is a small flatter portion of a friction ridge?

  23. Short Ridge

  24. What is it called when a dot or short ridge have ridges on either side of them?

  25. Island

  26. Which minutiae or ridge characteristic occurs when a friction ridge bifurcates (forks) and then converges (joins back together) to form a continuation of a single ridge?

  27. Enclosure

  28. Which Ridge Characteristic am I?

  29. Bifurcation

  30. Which Ridge Characteristic am I?

  31. Dot

  32. Which Ridge Characteristic am I?

  33. Spur

  34. Which Ridge Characteristic am I?

  35. Bridge

  36. Which Ridge Characteristic am I?

  37. Ridge Ending

  38. Which Ridge Characteristic am I?

  39. Island or Short Ridge

  40. Which Ridge Characteristic am I?

  41. Eye or Enclosure

  42. Which Ridge Characteristic am I?

  43. Delta

  44. Which Ridge Characteristic am I?

  45. Double Bifurcation

  46. Which Ridge Characteristic Am I?

  47. Trifurcation (Very Rare)

  48. What is the approximate center of a ridge pattern called?