Physical Evidence
Review Units 2 and 3
Physical Evidence Review
What does the 1st officer at
the scene need to do after
obtaining medical assistance?
Secure the Scene
Physical Evidence Review
What is the definition of a
crime scene?
The location where a crime
has / might have occurred
Physical Evidence Review
What are the methods of
recording a crime scene?
Note taking
Photographs / Video
Sketches
Physical Evidence Review
What must be included
in a rough sketch
Date, location, and time of incident
Location of all recovered evidence
Location of walls, doors, and windows
Indication of compass direction
Physical Evidence Review
What can CAD computer
programs be used for?
Producing a finished sketch
Physical Evidence Review
What must be included in the
notes taken at the crime scene?
The individual who packaged and marked
items of evidence
Location of physical evidence recovered
Disposition of items after collection
Date of the investigation
Physical Evidence Review
What are the crime
scene search patterns?
Grid, Line, Spiral, Zone
Physical Evidence Review
What is the chain of custody?
The list of every person who
has processed evidence
Physical Evidence Review
Who is responsible for
the chain of custody?
Crime scene processor
Evidence clerk
All forensic technicians
Physical Evidence Review
What results if the chain of
custody is not maintained?
Evidence will be
inadmissible in court
Physical Evidence Review
What is the main
purpose of a crime lab?
To identify and compare
evidence
Physical Evidence Review
What is the definition
of physical evidence?
Evidence that can be collected
Evidence that can establish a crime has been
committed
Evidence that links a crime to a victim and
perpetrator
Physical Evidence Review
How many layers of latex
gloves should be worn when
collecting bodily fluids?
Two
Physical Evidence Review
What type of containers are used
when packaging evidence?
Paper bags
Unbreakable containers
Forceps
Manila envelopes
Physical Evidence Review
What type of evidence is
usually found at an arson case?
Petroleum
Products
Physical Evidence Review
What type of evidence is
usually found at a car accident?
Paint
(glass)
Physical Evidence Review
What type of packaging
is used for arson cases?
Air tight containers
Physical Evidence Review
What is a buccal swab?
Swab of the inside of a
cheek to sample DNA
Physical Evidence Review
What is the purpose of a
standard reference sample
(control)?
To compare with evidence
at the crime scene
Physical Evidence Review
What is a control
substrate area?
The uncontaminated surface
material close to where physical
evidence is deposited
Physical Evidence Review
What is the purpose of collecting
standard reference samples?
It allows comparison with
the evidence
Physical Evidence Review
What does crime scene
reconstruction attempt to do?
Piece together stories by witnesses and suspects
Includes input from the medical examiner and the
results from the laboratory
Physical Evidence Review
What is needed to get a search
warrant from a judge?
The name, location, and
things to be seized and
probable cause
Physical Evidence Review
What are the exceptions to the
need for a search warrant?
Emergency
Evidence may be lost
Permission given
Imminent arrest
Physical Evidence Review
What privilege of the
Constitution includes
search warrants?
Fourth Amendment
Physical Evidence Review
What were the two cases that
tested the fourth amendment
regarding search warrants?
Mincey v Arizona – homicide
Michigan v Tyler - arson
Physical Evidence Review
What is the most
common type of evidence
found at a crime scene?
Class Evidence
Physical Evidence Review
What is the most important
aspect of photographs at a
crime scene?
The evidence has been unaltered.
Physical Evidence Review
Who is the final evaluator of
physical evidence?
Jury
Physical Evidence Review
What is individual evidence?
List TWO examples
Evidence that can be pinpointed to a
specific source
Ex: Fingerprints, DNA, bullet markings
Physical Evidence Review
This type of physical evidence can
be either natural or synthetic
Fibers
Physical Evidence Review
These are prints that are
accidental or chance prints that
are NOT visible to the eye
Latent
Physical Evidence Review
Gas, grease, and oil are often
used in _____________ cases.
Physical Evidence Review
What is class evidence?
List TWO examples.
Evidence that can only be associated
with a group and not a single
Ex: Fibers, Hairs, Blood Type
Physical Evidence Review
What can be found embedded in
shoes, as well as prove whether a
body has been moved, and link a
person to a certain location?
Soil and Minerals
Physical Evidence Review
Indentations left behind by a
particular object such as tool marks,
bite marks, and shoe prints is called…
Impressions
Physical Evidence Review
Powder from a firearm that can
be found on the shooter’s hand.
Gunshot
Residues
Physical Evidence Review
A shoe print made by a brand new pair
of sneakers is an example of …
Class evidence
Physical Evidence Review
Crime scene reconstruction requires
the efforts of these THREE people
Police
Medical Examiners
Criminalist
Physical Evidence Review
True/False
Street drugs are the only illegal
drugs that a person can have
False –
Prescription Drugs that
don’t have your name on
them are illegal