Question

forensic science
ch. 2 crime scene test
matching match item to the correct definition or description.

1. material that connects an individual or thing to a group that share similar characteristics
2. a material that can be related to a single source
3. a location other than where the crime took place, but is in some way related to the crime and where evidence is found
4. indirect evidence; evidence used to imply a fact but not prove it directly
5. the location where the crime took place
6. material that comes from a proven or known source
7. small but measurable amounts of physical or biological material found at a crime scene
8. evidence that (if true) proves an alleged fact, such as an eyewitness account of a crime

multiple choice write the letter of the correct answer on the line.

1. most wrongful convictions seem to be the result of:

a. improper evidence collection c. contamination of evidence
b. faulty eyewitness testimony d. out of date investigating equipment

1. locard’s exchange principle implies all of the following except:

a. fibers can be transferred from one person’s clothing to another.
b. blood at a crime scene can be used to identify blood type.
c. hair from your pet may be transferred to your clothing.
d. pollen from plants in your yard may be found on your shoes.
e. all of the above are implied by locard’s exchange principle.

1. a crime scene sketch should include all of the following except:

a. a label to indicate the direction of north on the diagram
b. a - scale of size or note if not drawn to scale
c. the location of the crime scene
d. the type of search pattern detectives used to make the sketch
e. all of the above should be included

1. it is important to separate witnesses at a crime scene in order to

a. protect them in case the perpetrator is among them
b. prevent contamination of evidence
c. prevent them from talking and forming a collusion
d. prevent them from leaving the scene

Explanation:

1. Class evidence connects an individual or thing to a group with similar characteristics.
2. Individual evidence can be related to a single source.
3. A secondary crime scene is related to the crime but not where it took place.
4. Circumstantial evidence is indirect and implies a fact.
5. The primary crime scene is where the crime occurred.
6. A control sample comes from a proven source.
7. Trace evidence is small measurable physical or biological material.
8. Direct evidence proves an alleged fact like an eyewitness account.
9. Faulty eyewitness testimony is a major cause of wrongful convictions.
10. Locard's exchange principle implies all the given transfer - related statements.
11. A crime scene sketch doesn't need to include the search pattern used.
12. Witnesses are separated to prevent them from talking and colluding.

Answer:

1. B. class evidence
2. E. individual evidence
3. B. secondary crime scene
4. A. circumstantial evidence
5. A. primary crime scene
6. C. control sample
7. C. trace evidence
8. D. direct evidence
9. b. Faulty eyewitness testimony
10. e. All of the above are implied by Locard’s exchange principle.
11. d. The type of search pattern detectives used to make the sketch
12. c. Prevent them from talking and forming a collusion