Principles of Exchange
Director of the world's first forensic lab in Lyon, France. Developed the Locard Exchange Principle.
Who is Dr. Edmond Locard?
Narrows an identity to a group of persons or things.
What is Class Evidence?
Photographing the crime scene, close-up photo of evidence.
What is step 4, seeing the scene?
These are the first responders that secure the crime scene.
Who are Police Officers?
Evidence that connects an individual or thing to a certain group.
What is class evidence?
The location where the crime scene took place.
What is primary crime scene?
After evidence is collected, where is it sent?
What is a forensic/crime lab?
Material that is transferred when one person comes in contact with another.
What is trace evidence?
Narrows an identity to a single person or thing.
What is Individual Evidence?
Using a pattern to ensure all evidence is secure.
What is step 6, Searching for Evidence?
These individuals document, collect evidence, record, and photograph the crime scene.
Who are Crime-Scene Investigators?
Indirect evidence used to imply a fact but not prove it directly.
What is circumstantial evidence?
A location other than the primary crime scene, but that is in some way related to the crime, where evidence is found.
What is the secondary crime scene?
Forming a hypothesis of the sequence of events from before the crime was committed through its commission.
What is crime scene reconstruction?
List 3 examples of trace evidence.
What are hair, fingerprints, soil, blood, glass, tissue, or fibers?
Two types of circumstantial evidence.
What are biological and physical evidence?
This step involves safety, securing evidence, and logging requests for additional help.
Step 7: Secure and collect Evidence.
This individual determines the cause of death.
Who is a Medical Examiner or Coroner?
The documented and unbroken transfer of evidence.
What is chain of custody?
This is faulty, not always accurate and does not always reflect reality.
What is perception?
This person receives the lab results after the analyzing of evidence process.
Who is the lead detective?
Explain the Locard Exchange Principle.
What is when a person comes in contact with another person or object a cross-transfer of physical evidence can occur?
Includes bodily fluid, hair, and natural fibers.
What is biological evidence?
This step involves creating a rough sketch to include all evidence, fixed points and directions, and all information to complete a final sketch.
What is step 5, sketching the scene?
This person looks for leads & interviews witnesses.
Who is a detective?
A hypothesis of the sequence of events from before the crime was committed through its commission.
What is crime-scene reconstruction?
A statement or assertion of information that can be verified .
What is a fact?
When evidence does not match the testimony of witnesses, this could be true
What is a staged crime scene?
This determines the amount of evidence that may be transferred in the Locard Exchange Principle.
What is the extent or duration of contact?
Includes fingerprints, tire impressions, fiber, bullet casings.
What is physical evidence?
This step involves questioning witnesses individually to avoid collusion.
What is step 2, separating the witnesses?
This person may be consulted if evidence requires his or her expertise.
Who is a specialist?
Item that is folded and used to hold trace evidence.
What is a bindle?
This is necessary to present credible evidence in court.
What is chain of custody?
Using arson to cover a homicide or bankruptcy
What is a staged crime scene?
Evidence Locard discovered that led to the 'Principle of Exchange'
What is fibers under the fingernails of a victim?
Evidence that (if true/authentic) proves an alleged fact, such as an eyewitness account of a crime.
What is direct evidence?
This step involves determining the primary and secondary crime scene.
What is step 3, scanning the scene?
In this step the CSI Team member is establishing a chain of custody and properly packaging evidence.
What is Step 7, secure and collect evidence?
The first police officer to arrive at a crime scene.
What is a first responder?
A small but measurable amount of physical or biological material found at a crime scene.
What is trace evidence?
After analyzing evidence, the results can be used to show/indicate..
What is compare evidence to witness accounts to confirm or acquit a suspect?