The ____ method is used at crime scenes to determine area of origin.

• A. Triangulation
• B. Stringing
• C. Base line
• D. Polar coordinates

Answer: (B)

When tracing bloodstain trajectories to find where the blood originated, the stringing method uses strings anchored at several stains to back-track their paths. By aligning the strings with the estimated travel direction of each stain, the lines visually converge toward a single point in space—the area of origin. This hands-on approach provides a clear three-dimensional cue on the scene and is practical because it doesn’t require heavy calculation; you can literally see where the patterns point. Other reconstruction approaches exist, but stringing offers a simple, intuitive way to visualize and pinpoint the source by watching the trajectories converge.