l3 CSI

Question 1

define crime scene

Answer 1

any place where a crime has been committed

Question 2

what is the primary scene? secondary scene?

Answer 2

primary is the site of the original criminal activity, secondary is any subsequent location

Question 3

what is ‘macroscopic’ when referring to a scene

Answer 3

refers to overall crime scene

Question 4

what is ‘microscopic’ when referring to a scene

Answer 4

trace evidence or ‘smaller scenes’

Question 5

what are the three major avenues available to investigators when solving crimes?

Answer 5

confessions, eyewitness accounts, physical evidence

Question 6

why is physical evidence so important?

Answer 6

only thing free of error or bias

Question 7

the likelihood that a suspect and victim are connected depends on..?

Answer 7

number of pieces of evidence linking them AND uniqueness of evidence

Question 8

probability of two individual events occuring together can be calculated by multiplying the individual probability of each event occurring alone

Answer 8

the product rule

Question 9

most experienced individual responsible for managing the crime scene

Answer 9

lead investigator

Question 10

the first person at the scene of a crime

Answer 10

first responder

Question 11

what is important to ensure when first responders detain witnesses? why?

Answer 11

keep witnesses seperate, do not let them revisit scene, keeps them objective

Question 11

5 duties of a first responder

Answer 11

1. assist victim, prevent any changes to victim
2. search for and arrest suspects
3. detain witnesses
4. secure scene
5. document all movement/changes to scene

Question 12

first examination/ orientation of scene by investigator

Answer 12

preliminary scene survey

Question 13

what is transient evidence?

Answer 13

physical evidence that can be easily lost or altered if not preserved properly

Question 14

what is conditional evidence?

Answer 14

evidence produced by specific event or action

Question 15

single most important task of a crime scene investigator

Answer 15

generate permanent record of scene and it’s physical evidence (documentation)

Question 16

what are the 4 major documentation tasks?

Answer 16

1. note taking
2. videography
3. photography
4. sketching

Question 17

after assisting victims and arresting suspects, the first officer arriving at the scene should..?

Answer 17

secure the scene

Question 18

police barricades and guards prohibit access to a crime scene for..?

Answer 18

all unauthorized personnel

Question 19

sucess in regoctinion and collection of evidence is primarily determined by..?

Answer 19

skill of personnel processing the scene

Question 20

evidence collector must ensure there is no potential contamination from transferring their DNA onto evidence by..?

Answer 20

wearing a face mask

Question 21

t/f main objective of packing and collecting physical evidence is to prevent any change in evidence from time it’s removed from scene and time it’s received by a lab

Answer 21

true

Question 22

t/f a rough sketch of a scene does not need to accurately depict dimensions of the scene

Answer 22

false

Question 23

search method that has two people performing line searches that originate at adjacent corners and form perpendicular lines

Answer 23

grid search

Question 24

search method that has one or two people walking in straight lines across the scene

Answer 24

line/strip search

Question 25

search method where scene is divided into smaller sections with a person assigned to each sections, sections may be further divided

Answer 25

quadrant/zone search

Question 26

search method; move in inward spiral from boundaries to center, or outward from center to barriers

Answer 26

spiral search

Question 27

draft representation of all essential info and measurements at a scene

Answer 27

rough sketch

Question 28

precise rendering of a scene, usually drawn to scale

Answer 28

finished sketch

Question 29

initial survey of the scene carried out by lead investigator where they gain an overview of the scene in order to create a plan for processing

Answer 29

walk-through

Question 30

chain of custody

Answer 30

list of all people who came into possession of an item of evidence

Question 31

search method, where several people move from the boundary toward center (inward) or from center to boundary (outward)

Answer 31

wheel/ray search

Question 32

standard/reference sample

Answer 32

physical evidence whos orgin is known, that can be compared to crime scene evidence

Question 33

examples of a standard sample

Answer 33

blood or hair from a suspect

Question 34

buccal swab

Answer 34

swab of inner potion of the cheek

Question 35

uncontaminated surface material close to an area where physical evidence is deposited

Answer 35

substrate control

Question 36

example of substrate control

Answer 36

unstained portion of a bloody t-shirt

Question 37

when should videography be performed? what should it not include?

Answer 37

after first walkthrough, should not include people, equipment or audio

Question 38

photo log

Answer 38

record of all crime scene photographs ith details

Question 39

t/f it is okay to delete or not log accidental photos

Answer 39

false

Question 40

what is the importance of sketching, what can it provide that other documentation cannot?

Answer 40

proper perspective and perspective of evidence in the scene

Question 41

how is a chain of custody ensured?

Answer 41

evidence sealed and initialed by collector, date, location and time collected are included