Fingerprints have been used since 1901 Fingerprints? DNA Fingerprints ! DNA Fingerprints since 1986.
Reading Fingerprints
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Reading Reading FingerprintsFingerprints
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Reading PrintsReading Prints The key to reading prints is not to find each The key to reading prints is not to find each
and every characteristic in the prints, but and every characteristic in the prints, but to get the trend of patterns. to get the trend of patterns.
Most prints found at a crime scene are Most prints found at a crime scene are partial prints which rarely contain all deltas partial prints which rarely contain all deltas and cores. and cores.
We must learn how to look at the trend of We must learn how to look at the trend of the lines as a whole, rather than individual the lines as a whole, rather than individual lines. lines.
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Double LoopsDouble Loops
Contain an “S” Contain an “S” shape within shape within
the print the print
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Plain Whorls & Central Plain Whorls & Central Pocket LoopsPocket Loops
These are the only prints that These are the only prints that contain a circle or spiral within the contain a circle or spiral within the printprintP
lain
W
horl
CP Lo
op
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Plain Whorl
Central Pocket
Loop
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Plain Whorl or Plain Whorl or Central Pocket Central Pocket LoopLoop
A Plain Whorl A Plain Whorl has symmetry-has symmetry-core in the core in the center, deltas center, deltas near the near the bottom of the bottom of the printprint
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Plain Whorl or Plain Whorl or Central Pocket Central Pocket LoopLoop
One of the One of the deltas on a deltas on a CPL will be CPL will be twisted and twisted and closer to the closer to the
core (no core (no symmetry)symmetry)
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LoopsLoops
These prints have some lines These prints have some lines that enter at one side, turn, that enter at one side, turn, and then exit the same sideand then exit the same side
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Uln
ar Lo
op
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Radia
l Lo
op
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ArchesArches
All lines All lines enter at one enter at one side of the side of the print and print and exit the exit the other other bsapp.combsapp.com
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