IAI - CSA Techniques of Crime Scene Investigation
questions with verified answers
After making sure the scene is safe, the first officer should? Ans✓✓✓ Attempt to
form an estimate of the situation—what happened here as quickly as possible.
Amido Black is used for? Ans✓✓✓ Developing prints in blood using the proteins
present in blood. Turns blue-black.
An outdoor scene at night is to be avoided except? Ans✓✓✓ There is a
compelling reason. Outdoor crime scene searches in daylight are more effectively
examined, yield more information, and are easier to conduct.
Another category for firearms (Barrel) Ans✓✓✓ smooth-bore or rifled
Before any actual crime scene work begins an investigator should? Ans✓✓✓
Formulate a systematic plan
Can every item of physical evidence be directly associated to a specific person,
place, or thing and believe that it is possible to link that evidence to a unique
source. Ans✓✓✓ No
Can Majority of Physical Evidence found at crime scenes be only Classified
Ans✓✓✓ True
Can physical evidence that is identified corroborate testimony, place a subject at a
scene, and be useful in a variety of ways as an interrogation tool? Ans✓✓✓ Yes
,Chain of Custody Ans✓✓✓ Proof that evidence collected during an investigation
and the evidence ultimately submitted to the court are one and the same. To
prove that the integrity of the physical evidence has been maintained. Shows who
had contact with the evidence, at what time, under what circumstances, and what
changes, if any, were made to the evidence.
Classification of Evidence Ans✓✓✓ Meaning physical evidence placed into
groups with all other items having the same properties or class characteristics.
Crime Scene Environments Ans✓✓✓ Dynamic, rapidly changing.
CSI Effect Ans✓✓✓ Has made jurors expect, even demand, physical evidence.
Define Arson Ans✓✓✓ Malicious and deliberate burning of property or the
burning of one's own property for some illegal purpose such as defrauding an
insurer.
Define contamination Ans✓✓✓ act of making impure or unsuitable by contact or
mixture with something unclean or foreign
Define Firearms identification. Ans✓✓✓ refers to the study of firearms and
includes the operation of firearms, cartridges, gunshot residue (GSR) analysis,
bullet and cartridge case comparisons, powder pattern determination, and the
like.
Doctors and nurses who treat rape or assault victims often are required to?
Ans✓✓✓ collect physical evidence relating to the assault.
,Edmond Locard Ans✓✓✓ French Forensic Scientist - Locard Exchange Principle
Evidence Ans✓✓✓ Something legally submitted to a competent trier of fact as a
means of ascertaining the truth of any alleged matter under investigation.
Father of Firearms Identification Ans✓✓✓ Col. Calvin Goddard
Fingerprints and DNA should be searched for and collected after trace evidence is
collected. Ans✓✓✓ True
Forensic dentist, or odontologist, may be called when? Ans✓✓✓ Mass disasters
such as plane crashes or scenes where charred remains are discovered
Forensic Nurses collect evidence for criminal investigations such as? Ans✓✓✓
Elder abuse, child abuse, and spousal abuse and in medical examiner and coroner
settings.
Forensic toxicologists may become involved when? Ans✓✓✓ Product tampering
cases to determine the nature of the adulterant in the foodstuff or consumer
product.
General rule of close up photography Ans✓✓✓ The ruler and the parallel film
plane ensure the ability later to produce good-quality enlargements or 1:1
photographs of the evidence
General Rule on collecting evidence Ans✓✓✓ As much material as is reasonably
possible to collect should be taken. More is better than less.
, Gentian violet or crystal violet is used for? Ans✓✓✓ Especially effective when
used on the sticky side of adhesive tape.
How do shotguns differ (two major ways) Ans✓✓✓ shotgun barrels are usually
not rifled but are smooth-bore and fire a different type of ammunition consisting
of many lead pellets, rifled slugs, sabots, or shot
How does Fingerprint evidence occur? Ans✓✓✓ Prints are formed by friction
ridges, which deposit grease and perspiration on the object touched, and may be
produced when criminals take hold of an object or support themselves with their
hands. Prints may be formed when fingers are contaminated with foreign
material, such as dirt, blood, or grease, or when the fingers are pressed against a
plastic material and produce a negative impression of the pattern of the friction
ridges.
How does the FBI define digital forensics? Ans✓✓✓ the application of science
and engineering to the recovery of digital evidence in a legally acceptable
method.
How is DNA degraded? Ans✓✓✓ environmental insults, aging, or some other
factor limiting the quantity of DNA extracted.
How is Y-STR helpful in investigations? Ans✓✓✓ might be used are those that
involve very high levels of female DNA mixed with small amount of male DNA or
where the number of men involved in a gang rape is unknown.
How long do studies show GSR will remain on someones hands? Ans✓✓✓ Up to
6 hours
questions with verified answers
After making sure the scene is safe, the first officer should? Ans✓✓✓ Attempt to
form an estimate of the situation—what happened here as quickly as possible.
Amido Black is used for? Ans✓✓✓ Developing prints in blood using the proteins
present in blood. Turns blue-black.
An outdoor scene at night is to be avoided except? Ans✓✓✓ There is a
compelling reason. Outdoor crime scene searches in daylight are more effectively
examined, yield more information, and are easier to conduct.
Another category for firearms (Barrel) Ans✓✓✓ smooth-bore or rifled
Before any actual crime scene work begins an investigator should? Ans✓✓✓
Formulate a systematic plan
Can every item of physical evidence be directly associated to a specific person,
place, or thing and believe that it is possible to link that evidence to a unique
source. Ans✓✓✓ No
Can Majority of Physical Evidence found at crime scenes be only Classified
Ans✓✓✓ True
Can physical evidence that is identified corroborate testimony, place a subject at a
scene, and be useful in a variety of ways as an interrogation tool? Ans✓✓✓ Yes
,Chain of Custody Ans✓✓✓ Proof that evidence collected during an investigation
and the evidence ultimately submitted to the court are one and the same. To
prove that the integrity of the physical evidence has been maintained. Shows who
had contact with the evidence, at what time, under what circumstances, and what
changes, if any, were made to the evidence.
Classification of Evidence Ans✓✓✓ Meaning physical evidence placed into
groups with all other items having the same properties or class characteristics.
Crime Scene Environments Ans✓✓✓ Dynamic, rapidly changing.
CSI Effect Ans✓✓✓ Has made jurors expect, even demand, physical evidence.
Define Arson Ans✓✓✓ Malicious and deliberate burning of property or the
burning of one's own property for some illegal purpose such as defrauding an
insurer.
Define contamination Ans✓✓✓ act of making impure or unsuitable by contact or
mixture with something unclean or foreign
Define Firearms identification. Ans✓✓✓ refers to the study of firearms and
includes the operation of firearms, cartridges, gunshot residue (GSR) analysis,
bullet and cartridge case comparisons, powder pattern determination, and the
like.
Doctors and nurses who treat rape or assault victims often are required to?
Ans✓✓✓ collect physical evidence relating to the assault.
,Edmond Locard Ans✓✓✓ French Forensic Scientist - Locard Exchange Principle
Evidence Ans✓✓✓ Something legally submitted to a competent trier of fact as a
means of ascertaining the truth of any alleged matter under investigation.
Father of Firearms Identification Ans✓✓✓ Col. Calvin Goddard
Fingerprints and DNA should be searched for and collected after trace evidence is
collected. Ans✓✓✓ True
Forensic dentist, or odontologist, may be called when? Ans✓✓✓ Mass disasters
such as plane crashes or scenes where charred remains are discovered
Forensic Nurses collect evidence for criminal investigations such as? Ans✓✓✓
Elder abuse, child abuse, and spousal abuse and in medical examiner and coroner
settings.
Forensic toxicologists may become involved when? Ans✓✓✓ Product tampering
cases to determine the nature of the adulterant in the foodstuff or consumer
product.
General rule of close up photography Ans✓✓✓ The ruler and the parallel film
plane ensure the ability later to produce good-quality enlargements or 1:1
photographs of the evidence
General Rule on collecting evidence Ans✓✓✓ As much material as is reasonably
possible to collect should be taken. More is better than less.
, Gentian violet or crystal violet is used for? Ans✓✓✓ Especially effective when
used on the sticky side of adhesive tape.
How do shotguns differ (two major ways) Ans✓✓✓ shotgun barrels are usually
not rifled but are smooth-bore and fire a different type of ammunition consisting
of many lead pellets, rifled slugs, sabots, or shot
How does Fingerprint evidence occur? Ans✓✓✓ Prints are formed by friction
ridges, which deposit grease and perspiration on the object touched, and may be
produced when criminals take hold of an object or support themselves with their
hands. Prints may be formed when fingers are contaminated with foreign
material, such as dirt, blood, or grease, or when the fingers are pressed against a
plastic material and produce a negative impression of the pattern of the friction
ridges.
How does the FBI define digital forensics? Ans✓✓✓ the application of science
and engineering to the recovery of digital evidence in a legally acceptable
method.
How is DNA degraded? Ans✓✓✓ environmental insults, aging, or some other
factor limiting the quantity of DNA extracted.
How is Y-STR helpful in investigations? Ans✓✓✓ might be used are those that
involve very high levels of female DNA mixed with small amount of male DNA or
where the number of men involved in a gang rape is unknown.
How long do studies show GSR will remain on someones hands? Ans✓✓✓ Up to
6 hours
