What is a critical consideration when making a preliminary survey at the crime scene?

A critical consideration when making a preliminary survey at the crime scene is ensuring the scene is contained. This step is vital to preserving evidence and preventing contamination. By securing the scene, investigators can protect the integrity of physical evidence, control access, and limit the disturbance caused by unauthorized individuals. This containment helps maintain a clear chain of custody and allows forensic teams to work effectively without the risk of losing crucial information or evidence.

Other actions, such as documenting weather conditions or counting witnesses, while helpful in the overall investigation process, do not hold the same immediate importance as securing the crime scene. Interviewing potential suspects is also an important aspect of the investigation, but it typically comes after ensuring that the scene is safe and contained. Maintaining the scene's integrity is foundational for the validity of the investigation that follows.