1. Chapter 14 Fingerprints

6. Fingerprint Principles Reproduction of friction skin ridges Palm side of the fingers & thumbs FINGERPRINTS

8. Principle One Individual Characteristic No Fingers Identical

10. Figure 14–1 Fingerprint ridge characteristics. Courtesy Sirchie Finger Print Laboratories, Inc., Youngsville, N.C., www.sirchie.com.

13. Fingerprint Comparison Figure 14–2 A fingerprint exhibit illustrating the matching ridge characteristics between the crime-scene print and an inked impression of one of the suspect’s fingers. Courtesy New Jersey State Police.

14. Principal Two Remains Unchanged During Lifetime

19. Principle Three Ridge Patterns Permit Systematic Classification

21. Loop Patterns

23. Principle Three - Loops Figure 14–5 Loop pattern.

25. Whorls

29. Plain Whorls

31. Whorls

32. Arches

40. AFIS

43. Visible & Latent Prints

46. Detecting Prints

52. Figure 14–17 Schematic depicting latent-print detection with the aid of a laser. A fingerprint examiner, wearing safety goggles containing optical filters, examines the specimen being exposed to the laser light. The filter absorbs the laser light and permits the wavelengths at which latent-print residues fluoresce to pass through to the eyes of the wearer. Courtesy Federal Bureau of Investigation, Washington, D.C.

59. Fingerprint Patterns

60. Taking Fingerprints

61. Summary