Sketch the Accident Scene
Sketches are very important because they complement the information in photos and are good at indicating distances between the various elements of the accident.
Pinpointing Location
It is important to be as precise as possible when making sketches.
Triangulation Method
The first sketch illustrates the Triangulation Method which makes it possible to later pinpoint the exact location of an object.
Using the triangulation method is important because it establishes "position evidence". In this accident, the victim contacted a high voltage line with a metal tree trimming pole. The position of the victim's head is measured from three points. Notice the small circles with horizontal lines through them. These circles indicate where photos were taken. Also, North is indicated and all major objects are identified.
Showing Motion Through Time
The second sketch illustrates one of the major advantages of sketching. It shows motion through time.
Major Advantages of Sketching
In this sketch, you can see the directions the deceased and the bulldozer were traveling shortly before the accident and at the time of the accident.
Sketches also help establish testimony if it becomes necessary to defend against a damage or injury claim. The sketch may also help establish a claim against a supplier or manufacturer.
You don't have to be a professional illustrator to make a decent sketch, but you must be accurate in your measurements.
- Make sketches large, preferably 8" x 10".
- Ensure sketches are clear and include information pertinent to the investigation.
- Include measurements and establish precise, fixed, identifiable reference points.
- Print legibly; all printing should be on the same plane.
- Indicate directions: N, E, S, W.
- Always tie measurements to a permanent point, e.g., a telephone pole or building.
- Mark the locations where people were standing.
- Use an arrow to indicate the direction of motion.
- Utilize sketches when interviewing people.
- Clearly show where photos were taken.
Knowledge Check Choose the best answer for the question.
3-6. Which sketching method makes it possible to pinpoint the exact location of an object?
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