ACE V Flashcards
In ACE V tolerance can be described as a means of expressing the variation that is allowable between two two impressions that originated from the same source. True or false
TRUE
When considering distortion on a finger mark, a ‘c’ shape or inverted ‘c’ shape is indicative of………of the digit when the mark was deposited
TWISTING
List the 3 Layers of skin
dermis, epidermis, hypodermis
True or false
Short ridges are often found in the delta
True
List 2 specific features that would be considered 2nd level detail.
Bifurcation, ridge endings, lakes, enclosures, ridge dots, dots, islands, incipient ridges, flexion creases
Name the layers of the epidermis
Horny Layer
Hyalin layer
Granular layer
Spinous layer
Basal layer
What are the 4 premesis of finger mark identification?
Fetus
Persistent scarring
Unique never repeated
Classification
Friction ridges develop on the fetus in their definitive form before birth
Friction ridges are persistent throughout life except for permanent scarring
The specific friction patterns and the details in small areas of friction ridges are unique and never repeated
Overall friction ridge patterns vary within limits which allow for classification
What two questions must be answered to reach an opinion of identification?
1) is there agreement of friction ridge detail between the unknown impression and the known sample? (Known and unknown- do they agree)
2)is there sufficient agreement in the friction ridge detail to identify?
Why is friction skin unique? (Three R’s)
Random timing- timing on the onset of primary ridge development in conjunction with regression of the volar pads, timing of onset of secondary ridge development (time of differentiation)
Random growth - ridge thickness/thinness, path a ridge takes, where a ridge starts and stops, ridge alignment, pore location and shapes
Random pressures - size/shape of volar pads, pressure from neigbouring ridges, pressures in the womb, numerous genetic and physical pressures.
The ace v process is objective or subjective.
Subjective
Qualitative- quantitative analysis refers to the amount of clarity present in friction ridge detail.
When the quality of detail is good….smaller or larger? Quantity of features is required to make an identification?
When quality of detail in a print is low, a smaller or larger? Quantity required
If the quality is low there will also be lower or higher level of tolerance?
Smaller
Larger
Higher
A comparison is completed by examining the unknown fingerprint and then the known fingerprint because it allows for an ……comparison and discourages……
Objective
Bias
What is the purpose of the analysis phase of Ace v ?
The gathering of information regarding the fingermark to determine if the impression is suitable for comparison by assessing if there is sufficient quantity and quality of detail in the impression , while identifying any factors that may distort the appearance of the ridge detail.
