Fingerprint Analysis Flashcards
This type of powder has been shown to be more sensitive than others, but also tends to adhere to both the fingerprint secretions AND the substrate.
Metallic Powder
Metallic powders are best suited to what type of substrate?
non-porous, smooth substrates
According to
The Fingerprint Sourcebook, who first documented the use of fingerprint powders?
Forgeot
The most important element in the case of fingerprint powder is minimizing what?
moisture
The most important complimentary features of fingerprint powder are what?
Contrast and Adhesion
This person is credited with being the first European to recognize the value of friction ridge prints and suggested they could assist in personal identification.
Sir William J. Herschel
Who was responsible for the acceptance of the use of fingerprints for personal identification?
Francis Galton
This person created the first classification system for fingerprints introduced into Europe.
Edward Henry
Who was the first Canadian trained in fingerprinting?
Edward Foster
This person described embryonic development of volar pads.
Inez Whipple
Who demonstrated that friction ridge skin is unique and never repeated in nature?
Harris Hawthorne Wilder
‘Anthropometry’ is an identification system also known as what?
Bertionage
Second level details refers to what?
Major ridge path deviations
Sebaceous glands produce what?
Lipids
Eccrine sweat contains 99% water and 0.5-1% of what?
1/3 inorganic salts and 2/3 organic compounds
Abnormal ridges (that don’t conform to the usual fingerprint patterns) may be caused by what?
Dissociation or Dysplasia
A primary ridge consists of ridge units fused together. Each ridge unit consists of what?
A sweat pore and sweat gland
What is in an incipient ridge?
A primary ridge that stopped growing at the time of differentiation
What method is used to identify a person using fingerprints?
ACE-V (analysis, comparison, evaluation, verification)
When speaking of friction ridge analysis, what is the matrix referring to?
The actual substance deposited by the friction ridges
Imbrication is a feature where friction ridges all tend to do what?
Lean in the same direction
What is the outer layer of the skin called?
Epidermis
The epidermis is made up of several layers of skin cells. These various layers can be divided into two groups. The inner layer is called the ______ stratum and the outer layer is called the _______ stratum.
Malpighi stratum and Corneum Stratum
The inner later of friction ridge skin is called the what?
Dermis
Injury or disease that penetrates the skin to the dermal papillae level can damage which epidermal layer?
The basal layer (generating layer)
The first noticeable development of friction ridge skin on the volar surfaces takes place at about how many weeks gestation?
12-13 weeks
The comparison of relative pore locations is called what?
Poroscopy
Friction ridges flow in concert with one another. When a ridge ends, the two adjacent ridges do what?
Flow together to fill the void
The first step in fingerprint analysis is ______.
examine print for clarity
Fingerprint comparison is always done from what to what?
A. unknown to known
B. known to unknown
unknown to known
What is meant by fingerprint evaluation?
Determining agreement (or lack of agreement) of three levels of detail
Determining whether a print can be included or excluded is done during what part of ACE-V?
evaluation
The matrix of friction ridge impressions could include?
a) secretion glands
b) amino acids
c) plastic salts
d) sebaceous and apocrine glands
amino acids
Organic substances that are part of the matrix of friction ridge secretions include:
a) chlorine
b) gastric acids
c) amino acids
d) hyalin secretions
amino acids
Name the five layers of the epidermis, from the top to the bottom.
horny, hyalin, granular, spinous, basal
Lacroix, Wolfe-Quenotm, and Haffen stated that friction ridges form in the fetus hand at how many weeks gestation?
13 weeks and onward
How is friction ridge identification established?
Through the agreement of friction ridge formations, in sequence, having sufficient uniqueness to individualize
What are the four premises of friction ridge identification?
- Unique
- Persistent
- Formed in utero
- Can be classified
A fingerprint impression with narrow furrows indicates what?
heavy deposition pressure
Which of the following is NOT a characteristics of a “double tap”?
a) misaligned ridges
b) cross over ridges
c) flattened ridges
d) ‘V’ at the top of the impression
c) flattened ridges
Can scars be used for identification purposes?
YES
A radial loop is found 85% on the time on what digit?
Index finger
When developing fingerprints with Indanedione, you excite the developed impression with a green light. What colour barrier filter would you start with to view the fluorescence?
a) green
b) orange
c) blue
d) yellow
b) Orange
Iodine developed prints can be accelerated to reveal themselves on the silver plate by applying:
a) 532nm laser
b) 720nm light
c) 580nm light
d) bright white light
d) bright white light
A good procedure to recover latent prints on a dusty surface is:
a) cyanoacrylate followed by fingerprint powder
b) magnetic fingerprint powder
c) standard fingerprint powder
d) lighting and photography
d) lighting and photography
This method has been suggested for the visualization and recovery of latent fingerprints on human skin.
a) iodine - silver plate
b) tape glo
c) Ninhydrin
d) DFO
a) iodine - silver plate
An effective procedure for the development of bloody fingerprints is:
a) laser with yellow filter
b) leach crystal violet (LCV)
c) Rodamine 6G
d) iodine/ silver plate
b) Leuco Crystal Violet
The primary reason to fingerprint cadavers is what?
Identify/ verify the identity of the deceased
Why are several amino acid reagents used in the sequence to examine porous surfaces for fingerprints?
a) Not all amino acid reagents react with all the amino acids that are found in eccrine sweat
b) the volume of eccrine sweat on the substrate is too much for one chemical to handle
c) any sebaceous materials on the substrate can interfere with one of the chemicals
d) one of the reagents may not have been mixed properly and you want to increase your odds of detecting prints
a) not all amino acid reagents react with the amino acids found in eccrine sweat
What must be included on fingerprint labels?
a) date, time of lift, badge #
b) R#, Ident officers initials, date, up arrow
c) R#, ambient temperature, address of service
d) R#, arrow, and police service
b) R#, Ident officers initials, the date, up arrow
What is the best method of documenting the various stages of chemical development of impressions?
Photography
Before applying any chemical techniques for developing latent prints suspected to be comprised of blood, the prints should be:
a) first examined with forensic light sources
b) glue fumed
c) refrigerated or frozen to fix them into place
d) treated with powders
a) examined with FLS
Marcello Malpighi contributed what to friction ridge science?
a) described and illustrated pores
b) described several layers of the epidermis
c) described the elasticity of friction skin
d) proved persistency
b) described several layers of the epidermis
Michio Okajima conducted research on what?
Incipient ridges
Who conducted persistency tests on his own palm prints between 1860 and 1890?
William Herschel
