1. Reading Fingerprints
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2. Reading Prints
The key to reading prints is not to find each and every characteristic in the prints, but to get the trend of patterns.
Most prints found at a crime scene are partial prints which rarely contain all deltas and cores.
We must learn how to look at the trend of the lines as a whole, rather than individual lines.
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3. Contain an “S” shape within the print
Double Loops
Contain an “S” shape within the print
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4. bsapp.com

5. Plain Whorls & Central Pocket Loops
These are the only prints that contain a circle or spiral within the print
Plain Whorl
CP Loop
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6. Central Pocket Loop
Plain Whorl
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7. Plain Whorl or Central Pocket Loop
A Plain Whorl has symmetry-core in the center, deltas near the bottom of the print
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8. Plain Whorl or Central Pocket Loop
One of the deltas on a CPL will be twisted and closer to the core (no symmetry)
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9. These prints have some lines that enter at one side, turn, and then exit the same side
Loops
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10. Ulnar Loop
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11. Radial Loop
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12. Arches All lines enter at one side of the print and exit the other
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13. bsapp.com