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FSC303 > Developing Fingerprint Impressions > Flashcards

Developing Fingerprint Impressions Flashcards

1
Q

What are the 5 steps to collecting fingerprint impressions?

A

Develop/locate
Label
Photograph
Document
Preserve

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2
Q

Describe the development/location stage of fingerprint collection.

A

Powder the surface and circle each impression as you locate it

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3
Q

Describe the labelling stage of fingerprint collection.

A

Mark each impression with all related information and place scales

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4
Q

Describe the documentation stage of fingerprint collection.

A

Make notes in memo book including location, R#, diagrams, measurements

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5
Q

Describe the preservation stage of fingerprint collection.

A

Lift the impression

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6
Q

What are the 5 main techniques of fingerprinting?

A

Granular powder
Magnetic powder
Metallic powders
Fluorescent powders
Advanced chemical developments

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7
Q

What are the three types of granular powders?

A

White
Grey/silver
Black

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8
Q

What is the most widely used powder for fingerprinting?

A

Granular

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9
Q

What are the three benefits of granular powders?

A

Easily transportable
White/black powders to provide contrast
Works on a variety of non-porous surfaces

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10
Q

What are the two cons to granular powders?

A

Becomes airborne easily and can be messy to work with
Must be cautious of over-powdering

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11
Q

What type of brush is used with granular powders?

A

Fibreglass tip brush

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12
Q

What is the most popular type of brush used for fingerprinting?

A

Fibreglass brush

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13
Q

Why is the fibreglass brush the most common?

A

Does the least amount of damage to the impression while carrying the most amount of powder

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14
Q

What are fibreglass brushes made of?

A

Nylon fibres

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15
Q

What is magnetic powder?

A

Contains iron particles and granular powder
Metal components act as a carrier for the powder

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16
Q

What is a benefit of magnetic powder?

A

Only the powder touches the surface, no chance of damaging the impression from the brush

17
Q

Why are granular powders stored in airtight containers?

A

Granular powders can be contaminated by moisture/foreign material

18
Q

What are the 5 pieces of information that should be included on a fingerprint label?

A

GO#
Date
Badge
R# of impression
Location

19
Q

What is a directionality arrow?

A

Indicates upwards, used on vertical surfaces only

20
Q

What is an R#?

A

Reference number that each lift is assigned

21
Q

What are the origins of R#s?

A

Originates from the photographic film and x-ray disciplines
An upper case R cannot be reversed and the orientation is easily established

22
Q

Describe the 3 steps in photographing fingerprint impressions?

A

Overall photo
Midrange
Closeup/Macro

FSC303 (18 decks)

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