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CSI (3rd year) > CS Sketch/ Measuring/ Exhibits > Flashcards

CS Sketch/ Measuring/ Exhibits Flashcards

1
Q

what is the purpose of a crime scene sketch

A
  • a record of the size and distance relationship of the CS and evidence found within in
  • clarifies info from photos and video (allows viewer to easily gauge distances and dimensions)
  • the easiest way to present the CS layout and associated measurements
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2
Q

what is a rough sketch

A
  • drawn at the scene, after photos, before anything is moved
  • not the final version (the final version is based on the rough sketch)
  • typically done in pencil
  • not to scale
  • measurements must be accurate
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3
Q

where should meaurements be taken from in a rough sketch

A

a fixed point of reference (wall, corner of building etc)

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4
Q

what info should be included in a rough sketch

A
  • date
  • address/location
  • name of person who drew sketch
  • direction (N/S/E/W)
  • scale
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5
Q

can you use exhibit number instead of writing out the name in a sketch

A

yes

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6
Q

can you use letters or numbers on a sketch

A

yes (as long as you have a legend referencing the letters/numbers)

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7
Q

what are the 3 measurement methods

A
  1. triangulation method
  2. rectangular co-ordinate method
  3. baseline method
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8
Q

describe the triangulation method

A
  • uses 2 fixed, permanent objects within the CS
  • measurements are taken from each fixed point to each piece of evidence
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9
Q

describe the rectangular co-ordinate method

A
  • used when measuring the distance to an object from 2 mutually perpendicular objects
  • useful for indoor scenes
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10
Q

describe the baseline method

A
  • used to measure items of evidence when there are various objects in the CS
  • lay a tape measure in the scene (baseline)
  • measure items off baseline at right angles
  • useful for outdoor scenes
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11
Q

is a scene diagram evidence

A

no

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12
Q

what is a scene diagram

A
  • demonstrative aid
  • used primarily for court purposes
  • helps to visualize CS
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13
Q

what dictates the type of search technique to be utilized

A

size and type of scene

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14
Q

can you use multiple search methods in one scene

A

yes

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15
Q

what must be established prior to searching the CS

A
  • what type of search technique to use
  • parameters and boundaris (when, where, how long)
  • roles (who is running the search)
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16
Q

describe the case of Andrea Atkinson

A
  • she was abducted, SA’d, and murdered
  • 9 days later her body was found in a boiler room by a janitor
  • PO had searched the building, but there was no record of when/who had searched that room (if at all)
  • DNA evidence helped convict another janitor of the crime
17
Q

what are the 4 main search techniques

A
  • line
  • grid
  • zone
  • spiral
18
Q

describe a line search

A
  • searchers move in parallel, defined lanes in the same direction
  • each lane is about 1 metre wide
19
Q

when would you use a line search

A
  • outdoor areas
  • large indoor areas
  • looking for bigger items
20
Q

describe a grid search

A
  • completing a line search in one direction, and then in the opposite direction
  • very thorough
  • time consuming
  • resource intensive
21
Q

describe a zone search

A

dividing an area to be searched into several adjacent zones

22
Q

when would you use a zone search

A
  • when looking for small objects
  • can be done by 1 or more searchers
23
Q

describe a spiral search

A

searcher walks in a circular direction from the inside/outside to the outside/inside of area to be searched

24
Q

when would you use a spiral search

A

when looking for evidence that is expected to be found within a specific distance of another piece of evidence (ex. looking for casing ejected from gun)

25
Q

what is key to do when seizing a vehicle to process

A

photo insitu before moving

26
Q

what is usually conducted prior to releasing a CS to the lead investigator

A

a final walk through

27
Q

what happens during a final walk through

A
  • last check for photos or videos to be taken
  • make sure all evidence has been collected
  • no equipement has been left behind
  • any issues (damage/ dangerous conditions) have been reported
  • ensure that scene examination has been complete and thorough
28
Q

what is included in the follow-up processing of exhibits

A
  • drying and packaging
  • further photos if needed
  • submit to labs
29
Q

what needs to be considered regarding exhibit storage after trial and appeal period

A

what can be returned and what has to be retained

30
Q
A

CSI (3rd year) (16 decks)

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