1. SWBAT take notes on how to sketch a crime scene in order to analyze rough sketches
Drill: How can we capture a crime scene for use later?
Tuesday September 30, 2014

2. The Crime Scene Sketch

3. Crime Scene Sketch Accurately portrays the physical facts
Relates the sequence of events at the scene
Establishes the precise location and relationship of objects and evidence at the scene
Creates a mental picture of the scene for those not present
Is a permanent record of the scene
Crime Scene Sketch

4. The Crime Scene Assists with…
Interviewing and interrogating persons
Preparing an investigative report
Presenting the case in court
The Crime Scene Assists with…

5. Crime Scene Sketch also…
Supplements photographs, notes, plaster casts and other investigative techniques
Crime Scene Sketch also…

6. Rough Sketch
Finished or scaled sketch
Two types of Sketches

7. Materials needed Paper Pencil Measuring tape Ruler Clipboard Eraser
Compass
Materials needed

8. Steps in Sketching a Crime Scene
Observe and Plan
Measure distances
Outline the area
Locate objects and evidence within the outline
Record details
Make notes
Identify the sketch with a legend and a scale
Steps in Sketching a Crime Scene

9. Measure and Outline Area
Use conventional units of measurement
Feet, inches, meters centimeters
North should be at the top of the paper
Measure and Outline Area

10. Take the longest measurement at the scene and divide it by the longest measurement of the paper used for sketching
1/2inch = 1’ small rooms
¼” = 1’ large rooms
1/8” = 1’ very large rooms
½” = 10’ large buildings
1/8” = 10’ large land area
Determining Scale

11. Measure and outline area
Measure from fixed locations
Walls
Trees
Telephone poles
Corners
Curbs
Outlets
Any Immovable Objects
Measure and outline area

12. Plot Objects and Evidence
Plotting methods are used to locate objects and evidence on the sketch. The most common practice is called rectangle coordinates
Plot Objects and Evidence

13. Rectangular Coordinates
Uses two adjacent walls as fixed points as distances are measured at right angles
Rectangular Coordinates

14. Common in outdoor scene
Uses straight-line measurements from two fixed objects to the evidence to create a triangle with evidence in the angle formed by two straight lines
Triangulation

15. Contains Direction of North Identifying information in sketch key
Scale
Make a Legend