What are sketches used for in crime scene investigations?

Sketches play a crucial role in crime scene investigations primarily because they are used to record the locations and relationships of evidence. This visual representation helps investigators understand how various pieces of evidence are positioned concerning one another and to the overall scene. A well-done sketch can provide a clear layout of the crime scene, illustrating crucial elements such as the positioning of victims, suspects, and physical evidence, which is vital for subsequent investigations, court presentations, and for future reference.

Sketches help document critical details that might otherwise be forgotten or overlooked, allowing investigators to analyze the spatial relationships between different pieces of evidence. They can also assist in reconstructing the sequence of events and in understanding how the crime may have occurred, contributing significantly to the overall investigation process.

Other options do not capture the primary function of sketches effectively. For instance, while reconstructing eyewitness testimonies may involve the use of sketches, it is not their primary purpose. Similarly, illustrating suspect behavior and serving as sole evidence do not reflect the foundational role that sketches play in documenting crime scenes accurately and comprehensively.