IAI - CSA Techniques of Crime Scene
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Terms in this set (223)
Evidence Something legally submitted to a competent trier
of fact as a means of ascertaining the truth of any
alleged matter under investigation.
Two Broad Types of Evidence 1. Testimonial Evidence
2. Real, or Physical Evidence
What is Physical Evidence? Any Type of Evidence with an objective
existence, that is anything with size, shape, and
dimension.
Physical Evidence may also be 1. Direct evidence (evidence that supports a
considered either conclusion of fact without inference)
OR
2. Circumstantial evidence (evidence that requires
inference to connect it to a conclusion of fact).
,Physical Evidence May be more reliable than eyewitnesses to
crimes.
CSI Effect Has made jurors expect, even demand, physical
evidence.
One Factor making the public's Science and technology are perceived by most
notion of the role of physical of the public to be unbiased and not subject to
evidence manipulation.
Negative Evidence the absence of physical evidence. May provide
useful information and even stop defense
arguments at the time of trial
Can every item of physical No
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.
Can Majority of Physical Evidence True
found at crime scenes be only
Classified
Classification of Evidence Meaning physical evidence placed into groups
with all other items having the same properties or
class characteristics.
Types of Pattern Evidence (fingerprints, firearms evidence, footwear
evidence, tire impressions, and tool marks)
Practitioners would offer a conclusive opinion
that the known and questioned item came from a
common source to a reasonable degree of
scientific certainty.
, The ability to associate an item of True
evidence to a sole, unique source is
currently being hotly debated.
What does DNA testing use? Statistical occurrence of discrete pieces of
genetic material or alleles.
Can physical evidence that is Yes
identified corroborate testimony,
place a subject at a scene, and be
useful in a variety of ways as an
interrogation tool?
Chain of Custody 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.
General Rule on collecting As much material as is reasonably possible to
evidence collect should be taken. More is better than less.
What is needed for Blood samples or buccal (cheek) swabs from the
known/exemplar samples for DNA? victim and suspect are needed.
What is needed for A known sample of paint from the questioned
known/reference or exemplar vehicle must be submitted for comparison.
samples for Automobile
Specimens?
Investigation Exam | Comprehensive Questions
and Answers | A+ Graded | With Expert
Solutions
Save
Terms in this set (223)
Evidence Something legally submitted to a competent trier
of fact as a means of ascertaining the truth of any
alleged matter under investigation.
Two Broad Types of Evidence 1. Testimonial Evidence
2. Real, or Physical Evidence
What is Physical Evidence? Any Type of Evidence with an objective
existence, that is anything with size, shape, and
dimension.
Physical Evidence may also be 1. Direct evidence (evidence that supports a
considered either conclusion of fact without inference)
OR
2. Circumstantial evidence (evidence that requires
inference to connect it to a conclusion of fact).
,Physical Evidence May be more reliable than eyewitnesses to
crimes.
CSI Effect Has made jurors expect, even demand, physical
evidence.
One Factor making the public's Science and technology are perceived by most
notion of the role of physical of the public to be unbiased and not subject to
evidence manipulation.
Negative Evidence the absence of physical evidence. May provide
useful information and even stop defense
arguments at the time of trial
Can every item of physical No
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.
Can Majority of Physical Evidence True
found at crime scenes be only
Classified
Classification of Evidence Meaning physical evidence placed into groups
with all other items having the same properties or
class characteristics.
Types of Pattern Evidence (fingerprints, firearms evidence, footwear
evidence, tire impressions, and tool marks)
Practitioners would offer a conclusive opinion
that the known and questioned item came from a
common source to a reasonable degree of
scientific certainty.
, The ability to associate an item of True
evidence to a sole, unique source is
currently being hotly debated.
What does DNA testing use? Statistical occurrence of discrete pieces of
genetic material or alleles.
Can physical evidence that is Yes
identified corroborate testimony,
place a subject at a scene, and be
useful in a variety of ways as an
interrogation tool?
Chain of Custody 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.
General Rule on collecting As much material as is reasonably possible to
evidence collect should be taken. More is better than less.
What is needed for Blood samples or buccal (cheek) swabs from the
known/exemplar samples for DNA? victim and suspect are needed.
What is needed for A known sample of paint from the questioned
known/reference or exemplar vehicle must be submitted for comparison.
samples for Automobile
Specimens?
