Fingerprints Review

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Author:
lydianoellerae
ID:
152738
Filename:
Fingerprints Review
Updated:
2012-05-07 16:31:50
Tags:
Fingerprints forensic science criminalistics
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Description:
Made for "Introduction to Forensic Science & Criminalistics" by Gaensslen, Harris and Lee
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  1. State the key contribution(s) made by the following individuals to the understanding and use of fingerprints in the forensic sciences: Hershel, Galton, Henry, and Vucetich.
    • Hershel
    • - followed his own fingerprints for 50 years; stay the same
    • Galton
    • - wrote book Finger Prints
    • - convinced British police to use fingerprints
    • Henry
    • - developed classification system used in the UK
    • Vucetich
    • - published book on fingerprints
    • - devised classification system
  2. Explain the roles played by each of the following in the formation of a latent fingerprit: ridges, valleys, and sweat glands.
    • Ridges
    • - show shape, minutiae, creases, scars, and sweat glands
    • Valleys
    • - show shape
    • Sweat glands
    • - produce and release oils
  3. Explain how the individual minutiae contribute to the overall uniqueness of a fingerprint pattern.
    No one has the same 150 minutiae in the exact same spots; fingerprints are unique
  4. Be able to recognize several key types of minutiae.
    • Island ridge
    • Dot
    • Bifurcation
    • Spur
  5. Know how to recognize and distinguish between the major fingerprint classes.
    • Loop
    • - one delta
    • - ulnar and radial
    • Whorls
    • - at least two deltas
    • - plain, twinned, central pocket and accidental
    • Arches
    • - no deltas
    • - plain and tented
  6. Provide the full name for IAFIS.
    Integrated Automated Fingerprint Identification System
  7. Distinguish between the three major categories of crime scene prints.
    • Visible
    • - patent
    • Plastic
    • - 3D
    • Latent
    • - not visible
  8. Provide at least two chemical and physical methods for enhancement of latent prints.
    • Chemical
    • - iodine fuming
    • - ninhydrin
    • - superglue
    • - physical developer
    • Physical
    • - magnetic powder
    • - black powder
    • - SPR
  9. What is RUVIS and what advantages does it have over chemical and physical processes?
    RUVIS is an illumination method; it's non-destructive and uses UV reflectance
  10. Know which fingerprint residues were targeted by each of the enhancement methods.
    • Magnetic Powder - humid, sticky or greasy residues
    • Black Powder - humid, sticky or greasy residues
    • Iodine Fuming - Fatty acids and lipid residues
    • Ninhydrin - Amino acids, peptides and proteins
  11. What is ACE-V and explain the steps.
    • Analysis
    • - gather
    • Compare
    • - levels of comparison
    • Evaluate
    • - identification, exclusion, or inconclusive
    • Verify
    • - colleague
  12. What are the different levels of comparison?
    • Level I
    • - basic shape (arch, whorl, loop)
    • Level II
    • - minutiae (bifurcation, spur, dot, island)
    • Level III
    • - pore numbers/size/location; scars; creases

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