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Chapter 1 and 2 Forensic test
Terms in this set (17)
What is perception?
the process of organizing and interpreting sensory information, enabling us to recognize meaningful objects and events
What is the Innocence Project? How are people exonerated
The innocence project is a organization that works with wrongly convicted due to faulty eyewitness testimony. Most people are exonerated using DNA evidence.
7 steps of processing a crime scene
a. secure the scene
b. separate the scene
c. scan the scene
d. see the scene
e. sketch the scene
f. search the scene
g. secure evidenxe
What are procedures for collecting evidence
a.liquid and arson go in strong, airtight containers
b.most biological evidence is stored in breathable containers
What is forensic science?
the application of science to law
What is Locard's exchange principle?
Cross transfer of physical material when a person comes in contact with an object or another person
What is the purpose of a crime scene rough sketch
To quickly note the positions of all evidence
What is the purpose of a crime scene sketch and what should be included in the drawing
a. To document the location of evidence and objects at a crime scene to allow it to be reconstructed if necessary in the future. Sketches should include a scale, legend, and indication of North.
What is direct evidence
First hand observations. Ex. Eyewitness testimony
What is circumstantial evidence?
Indirect evidence which implies a fact but does not prove it. ex: murder weapon, hair
What is class evidence
Evidence which narrows an identity to a group of people or things. Ex: blood type, shoe impressions
What is individual evidence
Evidence which narrows an identity to a specific person or thing. Ex: fingerprints, DNA
What could be considered trace evidence?
hair, fiber, fingerprints, paint chips, etc.
Compare and contrast physical and biological evidence. Give 2 examples of each.
. Biological evidence comes from a living thing (ex: blood, DNA) while physical evidence is most other evidence and not from a living thing (ex: glass, impressions)
Compare and contrast primary and secondary crime scenes
Primary is where the crime actually happened (not always the first place the police show up) and secondary is anywhere else related to the crime.
Explain what other branches of science might come into play during a forensic investigation. Give specific examples.
biology, chemistry, physics, microbiology
Are eyewitness testimonies very reliable forms of evidence? why or why not?
Not usually. Memory can be faulty and biased, especially as time passes.
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