What is the function of crime scene tape?

The function of crime scene tape is primarily to secure the crime scene and prevent unauthorized access. When a crime occurs, it is essential to preserve the integrity of the scene for investigation. Crime scene tape is used to create a physical barrier that not only demarcates the area where the crime happened but also ensures that only authorized personnel, such as police officers and investigators, can enter. This helps to maintain the evidence as it was found, preventing contamination or alteration, which is crucial for the investigation and any subsequent legal proceedings.

In contrast, the other options describe actions that are not the primary function of crime scene tape. While marking evidence locations and guiding officers may be aspects of the investigation, they do not pertain directly to the use of the tape itself. The primary role is to establish control over the area and maintain a secure environment where evidence can be collected without interference.