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CFA-Crime Scene Investigation

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Last updated 3 months ago
25 questions
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Question 25
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Which of the following best represents a secondary crime scene where evidence may be located?
A car where a driver is abducted in a carjacking.
An abandoned house ten miles from an abduction.
A bank where a robbery occurred.
A river bank where a murder took place.
What following actions does NOT align with the standard, systematic sequence of a crime scene investigation?
Separate the witnesses
Search for evidence
Sketch the scene
Select the motive
Which of the following evidence items requires protective padding such as wrapped in a soft cloth or cotton before packaging?
Blood spatter swab
Suicide note
Bullet fragment
Shell casing
Which of the following packaging options is least appropriate for properly securing and preserving evidence?
Bindle
Baggie
Envelope
Box
Which specialized subfield of forensic science focuses on the analysis of dental structures and records for identifying a subject?
Toxicology
Odontology
Entomology
Pathology
If a Joker from a deck of cards is consistently left at a crime scene this could be considered which of the following?
Signature
Method of operation
Modus Operandi
Duces tecum
When first responding officers arrive at a suspected crime scene, which action should be immediately taken before evidence collection?
Interview witnesses
make the scene safe
collect evidence
make an arrest
Which statement best captures the primary purpose of a crime scene investigation?
preserve evidence
make arrests
find the bad guy
change crimes
What specialized law enforcement unit is primarily responsible for processing a crime scene?
CSI
Crime Labs
Detective Unit
Forensic Science
Which development is the most widely regarded as the single most transformative breakthrough in modern Forensic Science?
DNA
latent fingerprints
lasers
facial recognition
According to Locard's Exchange Principle, which statement best explains what occurs whenever an individual makes contact with a crime scene resulting in the transfer of matter that can later detected, collected and analyzed?
DNA evidence
fingerprint evidence
trace evidence
circumstantial evidence
What is Locard's Principle of Exchange relate to?
The unique quality of each fingerprint
The grooves of a bullet specific to a firearm
The trace evidence left by every interaction
The distinct similarities between between family members
What are the three broad categories of bloodstain?
Impacted, transfer, projected
transfer, projected, aspirated
passive, transfer, projected
arterial, aspirated, impacted
What are the three general areas of ballistic examination?
terminal, external, internal
residual, terminal, rotary
circumstantial, external, internal
residual, rotary, circumstantial
Which of the following analysis process identifies fired ammunition and the comparison of microscopic markings determining whether the ammunition was fired from a specific weapon?
duquenois reagent
forensic firearm examination
bullet trajectory examination
biometric examination
Which statement most accurately defines Locard’s Exchange Principle?
a perpetrator of a crime will bring evidence and will leave evidence behind him
a perpetrator will leave evidence
a perpetrator will use gloves
a perpetrator always wipes clean all evidence
Which procedure best reflects accepted forensic practice for locating, documenting, collecting, and preserving blood evidence at a crime scene?
use a plastic bag
use a swab and air dry before packing
use white paper and air dry it
photograph the blood stain
In legal proceedings, what term refers to a tangible, physical item that is formally offered and admitted to support or refute a claim in court?
physical evidence
digital evidence
documentary evidence
direct evidence
Which concept best describes the event in which two surfaces come in to contact with one another, resulting in a transfer of materials?
social factors
psychological factors
Locard’s Theory
biological factors
Upon arrival at a residential burglary, officers first ensure there are no injured persons and that no immediate threats remain. The area is then restricted to authorized personnel only. After this initial response, a a specialized team assumes responsibility for documenting the scene, photographing evidence and collecting Items in manner that preserves their condition for later laboratory analysis.

Which unit is best suited to carry out the responsibilities described in the passage?
Burglary Unit
Crime Scene Unit (CSU)
Emergency Medical Services
Internal Affairs
Evidence that is commonly recovered from crime scenes such as: blood, saliva, sperm, hair, tissue, bones, teeth, blood, or other bodily fluids are known as?
Biological evidence
Trace evidence
Circumstantial evidence
Direct evidence
True/False: A Primary Crime Scene is in some way related to the crime but is not where the actual crime took place.
True
False
True/False: A secondary crime scene is where a crime actually occurred.
True
False
A fired bullet recovered from a crime scene is examined under a comparison microscope. Investigators observe unique striations that are consistent with markings produced by a single firearm's barrel.

Which forensic process allows examiners to determine that the bullet was from one specific weapon?
Ballistic trajectory analysis
Firearms identification
Gunshot residue testing
Toolmark Classification
Investigators recover fibers from a victim's clothing that are consistent with material found in a suspects vehicle. No eyewitnesses are present, but the fibers suggest the the victim and the vehicle were in close contact during the commission of the crime.

Which forensic principle best explains how the fibers could link the suspect to the crime scene?
Chain of custody
Forensic reconstruction
Locard's Exchange Principle
Class characteristic analysis