Fingerprint Test

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39 Terms

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loops 65%, whorls 35%, arches 5%

% of each type of fingerprint

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3 fundamental principles of fingerprints

They are unique, they can never change, they have ridge

characteristics which allow for classification.

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multi factorial trait; both DNA and environment (10-14 weeks gestation)

Origin of fingerprints

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ridge characteristics

Minutiae

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Latent

Hidden fingerprint

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Plastic

3-D fingerprint

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Patent

Visible

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Photographed, documented, and lifted if possible

All fingerprints must be:

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Integrated Automated Fingerprint Identification System

IAFIS

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Uncomfortable to Comfortable, thumbs roll in, fingers roll away

How to correctly roll inked prints

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Sir William Herschel

Had workers sign contracts with hand prints; fingerprints don’t change over time, and are unique

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Sir Edward Henry

The _____ System (based on presence/absence of whorls

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Dactylogram

Scientific name for a fingerprint

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does not exist, established by state, usually 12

legal minimum for match in court

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150

how many minutiae in each print on average

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Genes (DNA)

what codes for class patterns

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basal layer of epidermis

where are fingerprints formed

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Livescan

Digital machine used to take fingerprints

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Marcello Malphighi

First to describe loops, whorls and arches

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Juan Vucetich

Policeman who abolished anthropometry in favor of fingerprints in Argentine; 1st one to do so

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Plain Arch

knowt flashcard image
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Tented Arch

knowt flashcard image
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Plain Whorl

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Central pocket loop whorl

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Double loop

knowt flashcard image
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Accidental

knowt flashcard image
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Ulnar Loop (Right hand)

little finger opening

<p>little finger opening </p>
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Radial Loop (Right hand)

Thumb side of hand opening

<p>Thumb side of hand opening </p>
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The West Brothers

both prisoners at Leavenworth; identical body

measurements (Bertillon measurements), but different fingerprints – US finally adopted fingerprinting

and discarded anthropometry in favor of fingerprinting as way to identify people. _____ were either

identical twins or cousins; most likely given away at birth as they did not know each other.

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Bertillion

Came up with anthropometry; first “mug shots” – body measurements.

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Fingerprint Powder

For Non-Porus surfaces

Sticks to Oil and sweat

many different colors

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Ninhydrin

Best on paper

Reacts w/ Amino Acids

Permanent Purple

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Iodine

Cardboard and Porus Surface

Interacts w/ oils and Carbs in a fingerprint

Temporary orange prints reacts with starch solution and turns purple and permanant

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Super Glue

Plastic, Metal, glass

put inside a fuming chamber, settles on amino acids

Permanent white print

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Silver Nitrate

Wood + Styrofoam

interacts w/ NACL formed from sweat

black/reddish brown print

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