SWBAT debate the value of the Bertillion measurement system Do Now Are fingerprints class or individual Direct or circumstantial Every individual including identical twins has a unique ID: 740172
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Slide1
Unit 6: FingerprintingSlide2
Objective
:
SWBAT debate the value of the Bertillion measurement system
Do Now
: Are fingerprints class or individual? Direct or circumstantial?Slide3
Every
individual, including
identical twins, has a unique fingerprint
Type of Evidence:
Fingerprints are classified as individual evidence
Objective
: SWBAT debate the value of the Bertillion measurement system
Cool fact
: Fingerprints
formed in womb around 10 weeks into pregnancy Slide4
Bertillion
Measurements
: uses precise measurements of the body to identify an individual
Objective
:
SWBAT debate the value of the
Bertillion
measurement system Slide5
Complete Bertillion
Measurement
Lab and hand it in.Closure: How can this measurement system be useful in solving crimes? Should it be the only evidence used?
Objective
:
SWBAT debate the value of the Bertillion measurement system Slide6
Objective
:
SWBAT identify the types of fingerprint patterns in order to determine similar prints.
Do Now
: Look at your own fingerprints. Are all your print patterns the same?Slide7
Types of Fingerprints
LOOP
WHORL
ARCH
60%
5%
35%
Objective
: SWBAT identify the types of fingerprint patterns in order to determine similar prints.Slide8
Arches
are the
simplest type
of fingerprints that are formed by ridges that
enter on one side of the print and exit on the other
. No deltas are present.
Plain Arch
Ridges enter on one side and
exit on the other side.
Tented Arches
Similar to the plain arch,
but has a spike in the center.
Spike or “tent”
Objective
: SWBAT identify the types of fingerprint patterns in order to determine similar prints.Slide9
Loops
must have
one delta and one or more ridges
that
enter and leave on the same side
. These patterns are named for their positions related to the radius and ulna bones.
Delta
Ulnar Loop (Right Thumb)
Loop opens toward
right or the ulna bone.
Radial Loop (Right Thumb)
Loop opens toward the
left or the radial bone.
NOTE: On the left hand, a loop that opens to the left would be an ulnar loop, while one that opens to the right would be a radial loop.
Objective
:
SWBAT identify the types of fingerprint patterns in order to determine similar prints.Slide10
Whorls
have
at least one ridge that makes
(or tends to make)
a complete circuit
. They also have at least two deltas. If a print has more than two deltas, it is most likely an accidental.
Draw a line between the two deltas in the plain and central pocket whorls. If some of the curved ridges touch the line, it is a plain whorl. If none of the center core touches the line, it is a central pocket whorl.
Plain Whorl
Central Pocket Whorl
Objective
:
SWBAT identify the types of fingerprint patterns in order to determine similar prints.Slide11
Accidental Whorl
Accidental whorls contain two or more patterns (not including the plain arch), or does not clearly fall under any of the other categories.
Double Loop Whorl
Double loop whorls are made up of any two loops combined into one print.
Delta
Delta
Objective
:
SWBAT identify the types of fingerprint patterns in order to determine similar prints.Slide12
Closure: Identify
each fingerprint pattern.
?
A
B
C
D
E
Right Hand
Left Hand
Left Hand
Right Hand
Right HandSlide13
Complete
Part 1 of
“Sticky Fingers Lab” and hand it in.
Closure
: When observing a random fingerprint, which pattern will you expect to see most often?
Objective: SWBAT identify the types of fingerprint patterns in order to determine similar prints.Slide14
Do Now
: Which is the most common type of pattern in fingerprints
?http://
www.youtube.com/watch?v=d7N-4UNAzsw
Complete fingerprint identification card “10 card” activity.
Closure: What pattern do you have the most of: loops, whirls, or arches?
Objective: SWBAT identify patterns in their own fingerprints used in comparisons.Slide15
Do Now
: could scars on your fingers show up on a finger print? Could they be used to identify a person?
Objective
: SWBAT identify patterns in their own fingerprints used in comparisons.Slide16
16
Ridge Characteristics
Minutiae
—
characteristics of ridge patterns
Objective
: SWBAT identify patterns in their own fingerprints used in comparisons.Slide17
17
Example
Objective
: SWBAT identify patterns in their own fingerprints used in comparisons.Slide18
Comparison
There are no legal requirements in the United States on the number of points required for a match. Generally, criminal courts will accept 8 to 12 points of similarity.
Objective
: SWBAT identify patterns in their own fingerprints used in comparisons.Slide19
Complete Part 2 of “sticky
fingers
lab” and hand it in.Closure: Why is it so important to identify multiple points such as dots or bridges in a fingerprint?
Objective
:
SWBAT identify patterns in their own fingerprints used in comparisons.Slide20
Do Now
: Why do we have fingerprints?
Complete the “Identification of Minutiae” activity. Hand it in.Closure: What type of pattern is the easiest for you to spot in a print?
Objective
:
SWBAT identify the types of fingerprint patterns in order to determine similar prints.Slide21
Do Now
: What causes fingers to leave a print behind?
Complete fingerprint challenge. Hand it in.Closure: What surfaces do prints cling to the easiest? Why?
Objective
:
SWBAT identify the types of fingerprint patterns in order to determine similar prints.
Koalas have ridges on their fingers which create fingerprints almost identical to those of human beings. According to a number of websites, this means that koala fingerprints could be confused for human fingerprints at a crime scene. However, koalas have two thumbs on each hand..
Human beings have ridges over all of their palms, whereas koalas only have ridges over part of their palms. Slide22
Do Now
: Can you change your fingerprint by burning or scraping them?
Complete “The Mayfield Affair” case study. Hand it in.
Closure
: How do you think the FBI can make their fingerprinting analysis more effective?
Objective: SWBAT identify the types of fingerprint patterns in order to determine similar prints.Slide23
Do Now
: Why can’t fingerprints be lifted from cloth?
Developing Prints by dusting with Powder:
http
://www.youtube.com/watch?v=tqFzVfPRd5s
Objective: SWBAT research ways to pick up fingerprints.Slide24
Lifting prints off hard nonporous
surfaces (super glue fuming) such as glass and plastic:
http://www.youtube.com/watch?v=R0e8WXkFA64
Objective
:
SWBAT research ways to pick up fingerprints.Slide25
Iodine Fuming for lifting prints of paper:
http
://www.youtube.com/watch?v=SQ9dYQ_OSPg
Objective
:
SWBAT research ways to pick up fingerprints.Slide26
Complete Dusting/Lifting Print
Activity and hand it in.
Closure: The FBI’s fingerprint database is the largest in the world; because they (FBI) receives 34,000 fingerprint cards every
day. It has 10 times more data than that on DNA. What are some reasons fingerprints could be taken?
Objective
: SWBAT research ways to pick up fingerprints.Slide27
Do Now
:
Experts say that an Egyptian mummy still has very clear fingerprints even if they were embalmed years ago. How can this fact be useful if you are investigating a cold case?Complete case study on James Earl Ray.
http
://www.youtube.com/watch?v=-bZ-Vdhnno8
http://www.youtube.com/watch?v=v6u98z9MiwYClosure: Explain whether you think James Earl Ray would have been convicted if no fingerprints were found on the gun.
Objective: SWBAT research ways to pick up fingerprints.Slide28
Do Now
:
As humans get identified through their fingerprints, cats and dogs are by their nose prints. How could this be useful in a crime scene?
Complete
Fingerprint Matching ActivityClosure
: How many different “points of interest” on a finger print should be necessary to link a suspect to a crime.
Objective: SWBAT identify the types of fingerprint patterns in order to determine similar prints.Slide29
Do Now
: List a few ways to pick up prints at a crime scene.
Complete Latent Fingerprints Lab and hand it in.
Closure
: The iPhone 5s uses fingerprint scans to unlock the phone. Could this eventually infringe on our privacy rights?
Objective: SWBAT identify the types of fingerprint patterns in order to determine similar prints.