There are four basic types of crime scene sketches:

  1. Overview: Floor plan—bird’s-eye view
  2. Elevation view
  3. Cross projection: exploded view
  4. 3D drawing (perspective)

1. Overview: Floor Plan—Bird’s-Eye View:

  • A 2D drawing resembling an architectural floor plan, viewed as if from above.
  • All evidence appears on a single, horizontal plane, useful for providing an overall visual reference of the scene.

2. Elevation View:

  • Shows evidence on a single vertical plane, ideal for documenting vertical aspects like bloodstains or bullet defects on walls.
  • Useful for detailed documentation of specific scene elements, including clandestine graves and their layers.

3. Cross Projection: Exploded View:

  • Combines bird’s-eye view and elevation view into one sketch.
  • Walls are laid flat to show evidence on walls in relation to evidence on or near the floor, offering a comprehensive visual relationship of the scene components.

4. Three-Dimensional Drawing (Perspective):

  • The most realistic view, often created with computer-aided programs.
  • Allows for detailed height measurements and a perspective that can show what suspects, victims, or witnesses might have seen.
  • Provides the ability to rotate and adjust the view to simulate walking through the scene in 3D mode.

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