FINGERPRINTS

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FINGERPRINTS

• OR
• How to make an impression!

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Skin Layers

• Epidermis
• Dermis
• Hypodermis
• Muscle

Click here for more on Skin Layers
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FINGERPRINT an impression created by friction ridges on a persons hands and feet.
FRICTION RIDGES Minute raised lines on the surface of fingertips, toes, etc.
DACTYLOGRAPHY The scientific study of fingerprints as a means of identification.
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FINGERPRINTS

• Click here for BASIC Image of Loop, Arch, Whorl

Loop
Arch
Whorl
Click here for Detailed Image of 7 patterns
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TYPES OF FINGERPRINT IMPRESSIONS

• LATENT PRINTS Impressions that are transferred
  to as surface by oil, sweat, blood, or other
  substance on the ridges of the fingers. These
  may be
• VISIBLE
• INVISIBLE
• PLASTIC PRINTS Impressions made by touching a
  plastic-like substance (butter, wax, grease,
  clay, etc.) to leave a 3D form of a print.
• ELIMINATION PRINTS Prints taken to eliminate
  surrounding suspects.

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LOOP
ARCH
WHORL
Ulnar
Plain
Plain
Slants towards the little finger
Right hand ULNAR LOOP
Double-Loop
ULNAR
Tented
RADIAL
RADIAL
Radial
Right
Left
Slants towards the thumb
Accidental
Right hand RADIAL LOOP
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BIFURCATION DOUBLE-BIFURCATION A FORK IN A RIDGE
ISLAND A FORK THAT REVERSES
ENDING RIDGE A LINE STOPS
SHORT RIDGE A SHORT LINE
DELTA AN OVERALL PATTERN CHANGE FROM HORIZONTAL TO VERTICAL
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FINGERPRINTS
Ridge Ending Island Bifurcation Core
(split)
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CLASS FINDINGS
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CSI BEST H.S.
FINGERPRINTS
Mr. Detwiler