Podcast
Questions and Answers
A crime scene sketch is made to portray the information ______ rather than artistically.
A crime scene sketch is made to portray the information ______ rather than artistically.
accurately
Directionality of the overhead view is determined by using a ______.
Directionality of the overhead view is determined by using a ______.
compass
A rough sketch is usually made first on ______ paper in pencil.
A rough sketch is usually made first on ______ paper in pencil.
graph
Measurements of the distances between objects and/or structures are taken using a ______ measure or other measuring devices.
Measurements of the distances between objects and/or structures are taken using a ______ measure or other measuring devices.
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Two measurements taken at right angles to each other or from two ______ points will usually suffice.
Two measurements taken at right angles to each other or from two ______ points will usually suffice.
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A final sketch can be made later using ______, paper and ruler, or a computer.
A final sketch can be made later using ______, paper and ruler, or a computer.
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The original rough sketch should be retained and preserved in case it is needed at a later ______.
The original rough sketch should be retained and preserved in case it is needed at a later ______.
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A crime scene sketch is usually made of the scene as if one is looking straight down (overhead ______) or straight ahead.
A crime scene sketch is usually made of the scene as if one is looking straight down (overhead ______) or straight ahead.
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Use a ______ table for the evidence in your sketch.
Use a ______ table for the evidence in your sketch.
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Once the scene has been thoroughly documented, then the evidence ______ can commence.
Once the scene has been thoroughly documented, then the evidence ______ can commence.
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Study Notes
Smooth Sketch
- A smooth sketch is a finished sketch, often drawn to scale from the information provided in the rough sketch.
- If a sketch is drawn to scale, distances can be eliminated; otherwise, distances need to be shown.
Methods of Sketching
- Coordinate Method: measures the distance of an object from two fixed points, using a baseline and exact dimensions.
- Triangulation Method: useful in outdoor situations, measures distances from two or more reference points.
- Cross-Projection Method: useful for items on or in wall surfaces, measures from a given point on the floor to the wall.
General Rules of Sketching
- Decide what to sketch.
- Consider using a table to help with measurements.
- Eliminate unnecessary measurement lines for clarity.
- Note relationship measurements, which cannot be made on a scale drawing later.
Information to Include in the Sketch
- Crime scene sketcher's full name and assignment.
- Date, time, crime classification, and case number.
- Assistants' full names.
- Address of the crime scene, position, landmark, and compass direction.
- Scale of the drawing, if applicable.
- Major discernible items of physical evidence and critical features of the crime scene.
- Accurate measurements from at least two fixed points or by other methods.
Types of Sketches
- Rough Sketch: drawn free-hand at the crime scene, not to scale, but indicating accurate distances, dimensions, and relative proportions.
- Smooth Sketch: finished, often drawn to scale, and includes accurate measurements.
Importance of Sketches
- Sketches complement photographs and notes.
- Sketches are essential for recording a crime scene, especially when spatial relationships are important.
- Sketches clarify the appearance of the scene and make it easier to comprehend.
- Crime scene sketches can be made using graph paper, pencil, tape measure, and other measuring devices.
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Description
Learn about the different methods of sketching in police photography, including smooth sketches and coordinate methods. Understand the importance of scale and distance measurements.
