Upgrade to remove ads
Forensic Chapter 2 Test Review
Terms in this set (47)
Describe Locard's exchange principle.
When 2 things come in contact, a transfer always occurs
Give 5 reasons why evidence is so important in forensic science
Proves a crime was committed
Backups witnesses testimony, or proves it false
Links a suspect w a victim or w a crime scene
Determines identities of people
Allows us to reconstruct crime scenes
What all must be included in a crime scene sketch
Scale of distance
2 immovable objects
All objects in vicinity of the crime
Date, time, location, case # & names
Why is it important to separate any witnesses at a crime scene
It prevents them from working together to create a story
What info is included in the chain of custody
A list of all persons who have came into possession of an item in evidence
What are some signs a crime scene has been staged
No sign of forced entry
No items are stolen or in disarray
Drawers look overly ransacked
Victim had life insurance
Who is responsible for securing a crime scene
The first responder
Define & give an example of individual evidence
Narrows evidence down to a single person or thing
Ex: fingerprints & DNA
Describe the various containers used to collect trace evidence, bloodstained evidence, liquid evidence & charred evidence from a fire
Trace- plastic pill bottles w kids
Charred & liquid - airtight, unbreakable containers
Blood- wrapping paper/Manila envelope
What info is included on an evidence log
Description of evidence, name of suspect, name of victim, date & recovery time, signatures of who recovered it & any witnesses
Which amendment affects crime scene investigation? Explain how it affects an investigation
4th amendment & you have to have a warrant to search a house/facility
What are the 2 priorities while securing a crime scene
Safety & securing evidence
Define & give an example of class evidence
Narrows evidence to a group of persons or things
Ex: blood type narrows the suspect pool
What is the difference between a primary & secondary crime scene?
Primary is where the crime occurred, secondary is a place relevant to the crime, but not where it happened
Give 3 examples of direct evidence
Recording of the crime
Where should forensic detectives get control samples from? What are control samples used for?
Victims, family, paramedics/police
To compare to other crime scene evidence
What 3 factors determine the extent of the transfer of forensic evidence
Intensity, duration & nature of the materials
What is circumstantial evidence? Describe the 3 categories of circumstantial evidence
Indirect evidence that can be used to imply a fact, but does not prove it
Physical- most evidence
Biological- comes from something living
Trace- small, but crucial
List the professionals that make up the Crime Scene Investigation Team
First responder Detective
Backup police & maybe a DA Medical Examiner
Medics Photographer Lab experts
What should be included in crime scene photos
A measuring ruler & number
Why are evidence logs & chain of custody so important for evidence collection
If it is not done properly it will not be admissible at court
When can a crime scene be searched WITHOUT a warrant?
Danger to life or limb
Danger of loss or destruction of evidence
most wrongful convictions seem to be the result of what?
False witness reports
Circumstantial, physical, class
Circumstantial, physical, class
Circumstantial, biological, trace, class
Direct, physical, individual
List the seven S's & give a description
Secure the scene- arrest suspects & isolate area
Separate the witnesses- question them separately
Scan the scene- identify where pics need to be taken, determine primary & secondary crime scenes
See the scene- photography unit will take pics w & w/out a ruler
Sketch the scene- label N & have a scale of distant along w 2 immovable objects
Securing & collecting evidence- must be properly packaged & labeled
Search the scene- spiral, grid, linear & quadrant/zone
In a class of 25 students, 8 were wearing a pink shirt. 17 were wearing blue jeans. Eyewitnesses started the suspect was in the class & wearing both a pink shirt & blue jeans. What percent of the class could be suspects?
What is crime scene reconstruction & why is it important in an investigation
It allows the detectives to form a hypothesis of the sequence of events
List 5 questions that should be asked of eyewitness
When did it occur?
Who called in the crime?
Who's the victim?
What did you see happen?
Can the perpetrator be identified?
What is a paper bindle's purpose?
To hold evidence
What is the most important aspect in determining if evidence is admissible in court?
Proper handling of evidence
Secondary crime scene
A location other than where the crime took place, but is in some way related to the crime & where evidence is found
material that can be related to a single source
Chain of custody
a written record of all people who have had possession of an item of evidence
any place where evidence may be located to help explain events
evidence that (if true) proves an alleged fact, such as an eyewitness account of a crime
(indirect evidence) evidence used to imply a fact but not prove it directly
material that comes from a proven or known source
material that connects an individual or thing to a certain group that share similar characteristics
small but measurable amounts of physical or biological material found at a crime scene
District Attorney (DA)
The elected official who represents the government
the first police officer to arrive at a crime scene
Primary crime scene
the location where the crime took place
Locard's Exchange Principle
there is always a cross transfer of evidence between suspect and victim or locale.
When witness or suspects create a story of what happened at a crime
You might also like...
Forensics Chapter 2 Test
Forensics chapter 2
Forensic Science Chapter 2
Other sets by this creator
Latin & Greek terms