What is the primary responsibility of the first responder at a crime scene?

The primary responsibility of the first responder at a crime scene is to secure the scene. This essential task ensures that the integrity of the scene is maintained, preventing contamination or alteration of evidence. By establishing a secure perimeter, the first responder can effectively control access to the crime scene, allowing investigators to conduct a thorough examination without interference.

Securing the scene is crucial for preserving physical evidence, protecting the safety of individuals present, and maintaining the chain of custody for any evidence that may be collected later. Once the scene is secured, other functions such as gathering evidence, investigating suspects, and documenting witness statements can take place without the risk of disrupting the crime scene's original condition. This initial step lays the foundation for a successful investigation and is vital for achieving justice.