What should a law enforcement officer do first when they arrive at a crime scene?

When a law enforcement officer arrives at a crime scene, the first step should be to secure the scene. This is crucial because securing the scene ensures that evidence is protected from tampering or contamination. It allows the officer to establish a boundary around the area, preventing unauthorized individuals from entering and potentially disturbing critical evidence.

By securing the scene, law enforcement can also maintain control over the situation, which is vital for managing any potential threats to officer safety or the safety of others. Once the scene is secured, the officer can focus on other vital tasks such as interviewing witnesses, documenting the scene, and collecting evidence in a systematic manner without the risk of losing or compromising important elements of the investigation. This initial action lays the foundation for an effective investigation and helps ensure that the integrity of the evidence is preserved.