minicase5_crime scene sketching
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1. The Power of WordsObserve (v)to notice or perceive (something) as being significant, or important
The biologist observed the behavior of the alligator forseveral minutes.
Step 1. Copy the above word into your Vocabulary Book.
Step 2. Complete the activity on the back of this page.
CSI:THE CRIME SCENE SKETCHTodaysTasks1. Power ofWords
2. Pre-Lab
3. Lab
4. Post LabQuestions
ATL
Connections
- Communication
- Information
Literacy
- Collaboration
ATLs
Communicat
ion
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ObserveWrite a complete sentence about the cartoon above using the wordObserve.
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Write your own sentence using the word observeandsuspect.
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The Power of
WordsAnswer the following in completesentences.
ATLs
Commun
ication
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2. Pre-Lab TasksI need to know. . .
BackgroundThe art of forensic science begins at the crime scene. It is very important to protect and
secure the area where the crime took place to ensure that evidence is not destroyed.
Investigators carefully comb the crime scene for clues and evidence that later may be used
in a court. In order to record the crime scene, notes are taken, photographs are made, and
sketches are done. Photographs are usually the best record of the scene. However, there
are times when good photographs are not possible because of environmental restrictions.
In such cases, sketches and notes must be very detailed.
When possible, the crime site and adjacent locations are photographed before any other
investigative work is done. All victims are photographed as they were found. The size of a
body and other items are determined by placing a ruler in the photograph. Some larger
police departments are replacing photography with videotaping of the crime site.
Scene SketchOnce the photographer has completed his or her job, the crime scene investigator makes a
sketch of the crime scene. The initial sketch he or she makes is a rough sketch that
accurately represents the dimensions of the scene and shows the location of all objects
that may be important in the case. These objects, which help to establish that a crime was
committed, are called physical evidence. To give his or her sketch scale, the investigator
selects two fixed points (cannot be moved) at the crime scene. In a room, these may be
the corners, windows, or doors. The investigator uses a tape measure to determine the
distance of each important object in the room from both of these fixed points. These
distances are recorded in the sketch (Figure 1).
Once the locations of the objects have been recorded, each object is assigned a letter.
At the bottom of the sketch, these lettered objects are identified using a key. The sketch is
also oriented to the North (Figure 2). Later, a finished sketch is drawn from this rough
sketch by a skilled artist. This finished sketch reflects information in the rough sketch, but
is much neater (Figure 3). It may be used as evidence in the courtroom during a trial.
Note It
Notes are also taken at the scene of a crime that describes all physical evidence in detail.Notes include information about who discovered the evidence, the time that it was
discovered, and how the evidence was collected and packaged. Notes must be very
detailed in case they are needed to refresh someone's memory years after a crime has
been committed.
ATLs
InformationLiteracy
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Pre-Lab TasksI need to know. . .
ATLs
InformationLiteracy
1.! In Figure 1, use a ruler to measure how far the head is from thenortheast fixed point.
2.! In Figure 1, use a ruler to measure how far the head is from thesoutheast fixed point.
3.! What information do we need to know in order to determine how far thebody really was from the corner of the room?
Figure1
Aninvestigatormeasuresthedistancebetween
apieceofevidence,andtwofixedpoints.
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Pre-Lab TasksI need to know. . .
ATLs
InformationLiteracy
Figur
e2
Asketchis
orientedtotheNorth,andlabelsobjectsanddistances
.
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Pre-Lab TasksI need to know. . .
ATLs
InformationLiteracy
4. Use Figure 2 to fill in the following table:
5. In Figure 2, what does upturned chair mean, and why do you think it's important?
! ______________________________________________________________! ______________________________________________________________! ______________________________________________________________6. In Figure 2, how many windows do you see in the crime scene?
! ______________________________________________________________! ______________________________________________________________7. Describe what could have happened in this scene. Write at least 40 words.
! ______________________________________________________________! ______________________________________________________________! ______________________________________________________________! ______________________________________________________________
Figure 2 - Crime Scene Sketch Distances
Points Distance (cm)
A to NE Corner
B to SW Corner
Upturned Chair to Window
80
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Pre-Lab TasksI need to know. . .
ATLs
InformationLiteracy
Figure3
Thefinish
edCrimeSceneSketchisd
rawntoscalecorrectly
toscale,andismuchneaterthanthe
roughsketch.
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Pre-Lab TasksI need to know. . .
ATLs
InformationLiteracy
8. What is the scale that is used in Figure 3?
9. In Figure 3 match the letters to the following objects:
10. Describe at least two differences between Figures 2 and 3.
! ______________________________________________________________! ______________________________________________________________Complete the outline of the information using these words:photographs, rough, scene, fixed, secure, adjacent, ruler, sketching, objects, trial
I. Crime Scene Basics A. Protect and ___________________ the area B. Take ___________________ and complete sketches as necessaryII. Photographing the Crime ___________________ A. Photograph crime location and any ___________________ locations B. Photograph should include ___________________ for determining sizeIII. ___________________ the Crime Scene: Two Types of Sketches A. ___________________ Sketch i. includes dimensions ii. shows location of all ___________________ iii. includes two ___________________ points B. Finished Sketch i. is much neater than rough sketch ii. may be used in courtroom during a ___________________
Figure 3 - Imp rtant Objects
Object LetterTable
D
Television on Table
J
Gold Earring
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ATLs
Collaboration3. The LAB
On the Scene: RoughSketching1. Record the measurements of the
room from the board. Make a
rough sketch of the room on the
next page. Make sure to label the
lengths and distances.
2. With your group measure thecrime scene, and add details to
your sketch. Make sure to include
important information like windows
and doors, and all objects of
importance (with measurements to
On the Scene: ObservationYou will have 2 minutes to observe
the crime scene.
Try to remember as much as you can
about the crime scene.
After your observation answer the
following questions.
1.! What color shirt was the victim wearing?2.! Did the shirt have any writing on it? If so, what did it say?
3.! What kind of shoes was the victim wearing? What color?
4.! Did the victim have any jewelry on? Watch? Necklace? Bracelet?
5.! What was the victim holding in his hand? In which hand was it being held?
6.! What else can you remember about the victim?
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Evidence
ATLs
Collaboration
Crime Scene Sketch
After the Scene: Final Sketching
- Using graph paper, make a final scale drawing of the Crime Scene.- Use a scale of 1m : 50 cm (this means 2 boxes 1 meter).
- Make sure to include a key.
- Orient your drawing to the North.
KEY
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