Objectives: Students will be able to describe, compare, and
identify the different types of fingerprints.
DO NOW
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1. How and when are friction
ridges formed?
2.What is the Bertillonage
system?
3.Describe a loop, a whorl, and
an arch.
Exit Ticket
1.
Raised portions on your hands that allow for
gripping:
a.
Fingerprint
b. Whorls
2.
Define basal layer.
c. Friction Ridges
3. If 65% of fingerprints have loops,
how are fingerprints considered
individual evidence?
Announcements
 Exit Ticket trackers- absent
 Extra Credit
 Quiz 4 make ups
 Notebook Checks today
 Quiz on Tuesday
 Gloves on Friday and Monday
Review
 Fingerprint
 Bertillonage System
 Basal Layer
 Loop
 Whorl
 Arch
Galton System
 Turn/ Talk: why would the Bertillonage sytem fail
 Showed how to classify fingerprints using loops,
whorls, and arches
Fingerprints stay the same from birth to death
No two fingerprints are identical
Prints cannot be altered
Possible to classify
Ten card system
L. Thumb
L. Index
L. Middle
L. Ring
L. Little
R. Thumb
R. Index
R. Middle
R. Ring
R. Little
Mine
L. Index
L. Index
L. Index
L. Index
Classmates
Rules:
Partners
Light Pressure
Nail edge to nail edge
CFU….
T/F: your left index and right index fingerprints are the
same
Ridge classification
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Minutiae- description of fingerprints
Core
Short Ridge
Ending ridge
Delta
Hook
Crossover
Bridge
Bifurcation
Island (dot)
Enclosure
Eye
(yesterdays activity)
CFU….
 Minutia is the word used to describe what?
12 Point Match
 Criminal Courts will generally accept 8-12 point match
12 point system
 Your finger prints
 Some one else finger prints
Exit Ticket
Criminal court will accept a _____ point match for
fingerprint
a. 1
b. 12
c. zero, no two
fingerprint matches
are the same.
2. To individualize fingerprints, you must use the
structure of ridges called _______
3. What is the difference between fingerprint patterns
and ridge characteristics?
1.