The Crime Scene
The goal of a crime scene investigation is to recognize, document, and ________ evidence at the scene of a crime.
The goal of a crime scene investigation is to recognize, document, and collect evidence at the scene of a crime.
For someone to be found guilty of a crime, then the crime must be proven beyond a __________________________.
For someone to be found guilty of a crime, then the crime must be proven beyond a reasonable doubt
Which type of evidence, in general, is more reliable? Physical Evidence or Eye Witness Testimony?
Physical Evidence (in general)
Hair is considered this type of evidence.
Class Evidence
An estimated 95% of all fibres may fall or be lost within ______ hours.
24 hours
What is the first thing an Investigator must do when arriving at a crime scene?
Secure the Scene
Provide one reason a judge may eliminate a potential juror from participating.
- The person has personal interest in the matter being trialed
-The person has a personal relationship with the accused
-Personal hardship
-Any other reasonable cause (eg. school, caring for a newborn, etc.)
CSIs sometimes make a cast (or mold) out of the evidence at the scene. Which piece of evidence would need a cast made?
A. Fingerprint
B. Fibres
C. Chewed gum
D. Tire track
Tire Track
What type of cuticle scales are found with human hair?
Natural and Artificial
Plastic bag
(should be placed into a porous evidence bag)
This type of philosophy focuses on restoring relationships between offenders, victims, and communities in order to prevent future crimes.
Restorative justice
What type of evidence is placed into a paper bindle before being placed into an evidence bag?
Hair
What type of transfer is common with animal hair?
Secondary Transfer
Fibres can be tested and identified using several methods. List two.
Microscopic observation
Burning
Thermal decomposition
Chemical tests
Collusion
Criminal law is known as _______________ and its main purpose is to protect society.
Criminal law is known as public law and its main purpose is to protect society.
What type of evidence is temporary and easily changed or lost?
Transient Evidence
ex: smoke, odor, footprints, temperatures, tire marks
A medulla that is greater than 1/3 of the hair shaft is most likely this type of hair
Animal hair
Trace evidence is _____________ evidence found in _______ amounts at a crime scene.
Trace evidence is physical evidence found in small amounts at a crime scene.
What is described as:
Whenever two objects come in contact with one another, a cross-transfer of physical evidence can occur.
The Locard Exchange Principle
Before deciding on a sentence, a judge will consider “aggravating” and “mitigating” factors. Define both.
-Aggravating factors may “aggravate” the sentence (make it more severe).
-Mitigating factors help to diminish a sentence.
Evidence is categorized as Class Evidence and Individual Evidence. Define both.
Class—common to a group of objects or persons
Individual—can be identified with a particular person or a single source
Name the three layers of a hair shaft, listing them from the most inner layer to the outer layer.
Medulla, Cortex, Cuticle
What are two properties examined in soil evidence? (Think of the general terms)
Physical properties and Chemical properties