What types of perimeters should be established at a crime scene?

Establishing an inner and outer perimeter at a crime scene is crucial for effective scene management and evidence preservation. The outer perimeter acts as a barrier to restrict access by unauthorized individuals, thus protecting the scene from contamination and preserving the integrity of collected evidence. This area is typically monitored to ensure that only authorized personnel can enter.

The inner perimeter is established to restrict access to the immediate area where the crime occurred. This area allows for careful examination and processing by investigators and forensic teams without interference. By clearly delineating these two perimeters, law enforcement can efficiently manage the scene, prevent evidence tampering, and control the flow of personnel, which is essential for successful investigations.

The other options presented do not adequately capture the necessary levels of security and control required at a crime scene. For example, the concept of secure and unsecured refers more to the status of evidence, while public versus private pertains to the location of the scene and rights of access. Initial and secondary might imply different stages of investigation rather than the necessary spatial management at the scene itself.