What is the function of a crime scene investigator?

The primary function of a crime scene investigator is to process and document crime scenes. This entails a comprehensive range of activities, including collecting physical evidence, taking detailed photographs, sketching the scene, and ensuring that the chain of custody for evidence is maintained. By meticulously documenting the scene, the investigator plays a crucial role in reconstructing events that occurred during the crime, which can be pivotal for the subsequent investigation and legal proceedings.

Processing a crime scene includes securing the area to prevent contamination, identifying and collecting various forms of evidence (such as fingerprints, DNA, and weapons), and accurately recording details that might be critical to understanding the circumstances surrounding the crime. These tasks require a keen understanding of forensic principles and practices, as well as an ability to work methodically and often under pressure.

In contrast, writing legal documents is typically the responsibility of legal professionals, while interviewing suspects and witnesses falls under the purview of law enforcement officers trained in interrogation techniques. Analyzing financial statements is unrelated to crime scene investigation and pertains more to forensic accounting or financial audits. Therefore, the role of a crime scene investigator is focused on the immediate work of gathering and documenting evidence, making option B the correct choice.