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CSI Exam – Questions & Verified Answers
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CSI Exam – Questions & Verified Answers
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CSI Exam – Questions & Verified AnswersDefine Impression evidence Right Ans - Any evidence resulting from
minute imperfections on a large variety if objects that produce markings in
their normal or unusual usage
Two main categories of impression evidence Right Ans - Compression
marks & Scraping or striation marks
Explain Compression marks Right Ans - Those left when an instrument is
in some way pushed or forced into a material capable of picking up an
impression of the tool
Explain scraping or striated marks Right Ans - Combination of pressure
and sliding contact by a tool resulting in microscopic striations imparted on
the surface
Methods for preserving footprint evidence (3) Right Ans - Casting (3D)
Lifting (2D)
Photography (2D)
Types of casting (2) Right Ans - Dental stone
Snow wax
Common types of impression
evidence (3) Right Ans - Tire tracks
Shoe prints
Bite marks
Types of lifting for footprint and tire tracks (3) Right Ans -
Powders/chemicals
Photographic paper
Static electricity
How suspects are identified using tooth mark evidence (characteristics)
Right Ans - Position of teeth
Distance between teeth
Ridges on edges of teeth
Grooves on front/back of teeth
, Deformities in teeth
Wear of teeth
Loss of certain teeth
Ridges of furrows (smooth out with age)
Tooth mark characteristics Right Ans - Can leave compression and/or
scraping marks
Can provide individual or class characteristics
Can eliminate suspects
Can be found on: skin, food, and pencils
Can provide DNA from saliva deposited
Ways tooth marks are preserved (2) Right Ans - Photographs
Casting
Scale used when photographing tooth marks Right Ans - ABFO Scale
(American Board of Forensic Odontology)
Changes in tooth mark impressions Right Ans - Foods-decomposition of
material
Human skin- Healing
Casting tooth impressions Right Ans - Plaster cast from suspect
Consider legal requirements (consent or search warrant)
Methods used to compare tooth mark impressions Right Ans - Photograph
to photograph
Photograph to model
CAT scanning
Ultraviolet imaging
Computerized analysis (LUCIS)
Collecting tooth mark impressions from skin Right Ans - Collect
saliva/blood
Can lift with print powders
Over several days there will be healing
Where are tool marks typically found? Right Ans - Burglary scenes
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