Final answer:
In multilevel containment of a crime scene, a crime scene entry control log is necessary at the main scene and other levels of containment, such as building entrances or street cordons, to record all individuals accessing the area.
Step-by-step explanation:
In multilevel containment, where multiple barriers are used to secure a crime scene, a crime scene entry control log is necessary not only at the actual scene but also at other levels of containment that may be established around the core scene. There might be a need for separate logs at outer perimeters which could include areas such as a secured building entrance, a cordoned-off street, or the edge of a larger restricted area. These logs are used to track all individuals who enter and exit the scene, ensuring the integrity of the scene and safeguarding evidence.
A well-maintained entry control log serves multiple purposes. It provides a record of all personnel who had access to the crime scene, which can be crucial in the event of a contamination issue, or if there is a need to follow-up with anyone who has entered the area for further investigation or testimony. Precise record-keeping is foundational in the investigation and legal processes to avoid any potential tampering or mishandling of evidence which could compromise the case.