Initial Steps in Crime Scene and Collision Investigation

Welcome to the first moments at a crime scene or the aftermath of a collision. Proper handling of these first few minutes can significantly impact the outcome of an investigation. Let's explore the critical steps that must be taken, emphasizing the importance of securing the scene, evidence collection, and ensuring the safety of all involved.

Crime Scene Security: The Time-Sensitive Task

Recent cases have shown that the immediate security of a crime scene is crucial to the effectiveness of a subsequent investigation. Without prompt and proper security, evidence can be contaminated, rendering it useless in court. This is especially true for sensitive cases where the first moments of encountering a crime scene can mean the difference between a profitable investigation and one that fails to produce results.

The Role of Citizens and First Responders

Citizens and first responders must understand the critical nature of their actions at the scene. As a citizen, it is essential to immediately leave the scene and notify law enforcement or the appropriate agencies in case of evidence. Touching any objects or areas can significantly contaminate the scene. It is important to be explicit about the actions and observations made at the scene. Any statement like 'I rolled her over to see' or 'I checked my safe to ensure my valuables' could introduce bias or contamination to the scene.

Initial Investigations: Technical Collision and Beyond

As a Technical Collision Investigator, my role involves examining vehicle-related crimes while securing the scene safely to avoid becoming another victim of the crash. Unlike regular crime scenes, vehicle investigations must incorporate traffic management to ensure the safety of all individuals involved, including law enforcement. Directing traffic and ensuring the scene is secured are the top priorities, followed by identifying the drivers and collecting their information.

Scenario Walkthrough: A Typical Collision Scene

A typical collision involves two vehicles with no injuries. In this scenario, I would secure the scene, call for assistance if necessary, and document the drivers' information. However, for more complex scenarios, such as a fatality, serious injury, or a drunk driving incident, additional steps are required. These include taking detailed photos and measurements, assessing vehicle positions, and using roadway markings to determine speeds and positions over time.

In Depth: Vehicular Assault and Homicide

For the most critical cases, such as vehicular assault or homicide, the process becomes even more intricate. After securing the scene, the primary focus shifts to evidence collection, scene investigation, and ensuring the safety of the involved parties. If drivers are injured or impaired, they must be handled with care to prevent further harm. Blood samples may be required, and the driver may need to be taken for a breathalyzer test or a blood draw if they refuse.

Post-Investigation Work

While the primary investigation focuses on collecting and securing evidence, substantial work lies ahead. Detailed measurements and calculations are required to reconstruct the event and provide the necessary data for legal proceedings. In the case of vehicular homicide and assault, the bulk of the investigation happens post-scene, involving the preparation of case files, legal proceedings, and ultimately, the court process.

Proper handling of these initial steps is crucial to ensure the success of any investigation. By prioritizing the security of both human life and evidence, law enforcement can effectively facilitate a fair and just legal process.