What is the document that officers refer to for recording their observations at crime scenes?

Field notes are an essential tool for officers at crime scenes, as they provide a method for recording observations and details that are crucial for investigations. These notes can include descriptions of the scene, actions taken, interactions with witnesses or suspects, and other pertinent information that may be relevant for reports or testimony later on.

The accuracy and thoroughness of field notes can significantly impact the effectiveness of an investigation. Officers rely on these notes to recall specific details that could otherwise fade from memory over time. Additionally, field notes are often considered primary evidence in legal proceedings, as they document the officer's firsthand observations and actions at the scene.

While other options may involve documentation or records kept by officers, they do not serve the specific purpose of capturing immediate observations in a dynamic and changing environment like a crime scene. Therefore, field notes are the correct choice for capturing and preserving critical information during the initial response.