IZD1901 > Finger Printing > Flashcards

Finger Printing Flashcards

(73 cards)

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1
Q

(FingerPrinting)

A
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2
Q

(FingerPrinting) Purpose of Fingerprinting

A

To tie someone to a crime

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3
Q

(FingerPrinting) What is a “Latent Print”?

A

“Hidden” Print

An unintentional impression of friction ridges that may be left on an object when touched

“A series of peaks and valleys”

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4
Q

(FingerPrinting) Friction Ridges

A

are the peaks and valleys of the finger prints

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5
Q

(FingerPrinting) What does “Latent” mean?

A

Hidden

Use this in your reports

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6
Q

(FingerPrinting) Primary Ridges are…

A

The peaks of the fingerprint

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7
Q

(FingerPrinting) Secondary Ridges are….

A

The valleys of a fingerprint

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8
Q

(FingerPrinting) What are the (3) Different Types of Fingerprints

A

(1) Latent Prints
(2) Patent Prints
(3) Plastic Prints

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9
Q

(FingerPrinting) What are “Latent Prints”

A

“Hidden” Prints

Must be enhanced to be seen

Composed of 99% water

Very Fragile

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10
Q

(FingerPrinting) What are Patent “Prints”?

A

Visible without enhancement

Friction ridges covered in foreign substance (such as blood)

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11
Q

(FingerPrinting) What are “Plastic Prints”?

A

Three-dimensional

Friction ridges pressed into a soft substance (such as Clay)

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12
Q

(FingerPrinting) Latent Prints are used for ________ ___________

A

Identification Purposes

Establishes:
- Presence at a crime scene
- Contact with item of evidence
- Confirm or refute an incident

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13
Q

(FingerPrinting) Why are “Latent Prints” so important?

A

Uniqueness

Permanence

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14
Q

(FingerPrinting) True/False - fingerprints CANNOT be used to determine when a print was deposited on a surface

A

True

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15
Q

(FingerPrinting) True/False - Fingerprints CANNOT determine age, sex, or race of an individual who deposited a latent print

A

True

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16
Q

(FingerPrinting) True/False - Fingerprints are unique to an individual meaning no one has the same

A

True

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17
Q

(FingerPrinting) What are the (3) different fingerprint types

A

(1) Loops
(2) Whorls
(3) Arches

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18
Q

(FingerPrinting) Ridges enter from one side of print, curve near center, and exit out the same side. Most common pattern.

A

Loop Pattern

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19
Q

(FingerPrinting) Have one or more ridges that make a complete circle near center of print. Second most common pattern.

A

Whorl Pattern

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20
Q

(FingerPrinting) Ridges enter from one side, make wave near center, and exit the other side. Least common pattern.

A

Arch Pattern

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21
Q

(FingerPrinting) What is the most common fingerprint type

A

Loops

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22
Q

(FingerPrinting) What is the least common type of fingerprint pattern

A

Arches

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23
Q

(FingerPrinting) What is the second most common fingerprint type?

A

Whorls

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24
Q

(FingerPrinting) What are “Delta’s”?

A

Triangles where ridges come together

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25
(FingerPrinting) What are (3) Ridge Characteristics?
(1) Ending Ridge (2) Bifurcation (3) Dot “Minutia” - common name
26
(FingerPrinting) True/False - Most prints found at a crime scene are partial prints
True
27
(FingerPrinting) True/False - Small areas, about the size of a pencil eraser may contain enough information to identify someone
True
28
(FingerPrinting) What does a comparison value depend on (3) ?
(1) Overal Clarity (2) Amount of Information (3) Type of Information
29
(FingerPrinting) With fingerprints, when in doubt…..
Preserve the print
30
(FingerPrinting) True/False - If there are not latent prints on a surface it means the individual did not touch the surface
False
31
(FingerPrinting) What are (3) main reasons prints are NOT recovered from surface/item
(1) Environment (2) Surface (3) Person
32
(FingerPrinting) True/False - Heat may dry out prints
True
33
(FingerPrinting) True/False - Rain may wash a print away
True
34
(FingerPrinting) Material that allows liquid to pass through
Porus
35
(FingerPrinting) Material that does not allow liquid to pass through
Non-Porus
36
(FingerPrinting) Material that may allow liquids to pass through
Semi-Porus
37
(FingerPrinting) What are the (3) Categories of surfaces
(1) Non-Porous (2) Porus (3) Semi-Porus
38
(FingerPrinting) What are some examples of “Non-Porous” surfaces
Glass Metal Plastic Glazed Ceramic Finished Wood Painted Surfaces
39
(FingerPrinting) What are some examples of “Porous” surfaces
Paper Cardboard Raw wood
40
(FingerPrinting) What are some examples of “Semi-Porous” surfaces
Leather Glossy Paper Disposable gloves
41
(FingerPrinting) True/False - Best practice is to submit small and easy to collect items
True
42
(FingerPrinting) What is “Nyinhdrin"
chemical used to lift or raise prints on surfaces. It reacts with amino acids used in a fumed hood Purple in color
43
(FingerPrinting) Fluoresce fingerprint processing
DFO / Indanedione
44
(FingerPrinting) Things you should not powder for prints
(1) Thermal Paper (2) Sticky Side of Tape (3) Blood (4) Grease/Oils/Fuel (5) Dust
45
(FingerPrinting) Where do we find fingerprints?
Path perpetrator may have traveled (Entrance/Exit, Doors, Windows, Walls) Touched items (Light switches)
46
(FingerPrinting) Items sometimes left behind
Cans/Bottles/Receipts Poop - Store in fridge
47
(FingerPrinting) Before handling or collecting Evidence (3)
(1) Wear Gloves (2) Handle by edges or in texture areas (3) Collect or Process Items
48
(FingerPrinting) These prints are taken in a controlled environment from a known individual
Elimination Prints
49
(FingerPrinting) Major Case Prints
Gets every inch of the hand
50
(FingerPrinting) True/False - You should make sure prints are clear and pattern type fully represented
True
51
(FingerPrinting) ____ - _____% of latents found at a crime scene are ____ ______
10 - 30% are PALM PRINTS
52
(FingerPrinting) Major Case Prints usaulally document….
Every square inch of friction ridge skin
53
(FingerPrinting) Thumb question numbering
Right hand right thumb = Number 1 Left hand thumb = 6 Potential Test question***
54
(FingerPrinting) True/False - Fingerprints are used to ID unknown and deceased individuals
True
55
(FingerPrinting) True/False - To find finger prints you shud search with a flashlight using low or oblique angles
True
56
(FingerPrinting) True/False - Fingerprints found with a flashlight should be photographed before trying to lift them
True
57
(FingerPrinting) True / False - Powdered prints MUST be preserved by lifting and/or photography
True
58
(FingerPrinting) True/False - Generally, powdered items are not sent to lab for additional processing
True
59
(FingerPrinting) What are the (5) Steps to ‘Powdering'
(1) Prepare Brush (2) Dip Brush Into Powder (3) Apply Powder (4) Light Stokes are Key (5) Dress Print
60
(FingerPrinting) Not ideal for textured surfaces
Standard Powder
61
(FingerPrinting) Should use ______ ______ on smooth surfaces and metal object
Standard Powder
62
(FingerPrinting) Powder that should be used on textured surfaces or plastics
Magnetic
63
(FingerPrinting) What type of powder should not be used on metal objects
Magnetic Powder
64
(FingerPrinting) Photographs need to have what in focus
Scale
65
(FingerPrinting) What format should be used for photographs
RAW TIFF JPEG - not preferred
66
(FingerPrinting) True/False - Do you need to fill out the back of a lift card
True
67
(FingerPrinting) Proper documentation guards against claims of….
Fabrication
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