What term fits a situation where a police officer must log their arrival for accountability?

In this situation, the term that best fits the requirement for a police officer to log their arrival is "Arrived." This term specifically denotes the action of an officer marking the time and presence at a specific location as part of their duty. By logging their arrival, the officer is ensuring that there is a clear record of when they were on the scene, which is essential for accountability, reporting, and maintaining accurate timelines of events.

In police work, accurate documentation is vital for various reasons, including providing a factual basis for reports and ensuring accountability in law enforcement operations. The time and date documented when an officer arrives can be crucial in investigations, court proceedings, and for internal audits within the police department.

The other options relate to aspects of police work but do not specifically convey the notion of logging an officer's arrival in a manner as direct as “Arrived.” A case file usually encompasses a collection of documents and evidence pertaining to a specific case, an incident report details the events surrounding a specific incident, and a response log may refer more broadly to the record of actions taken during a shift, not just the arrival. Thus, “Arrived” succinctly captures the precise action of logging the officer's entry to the scene.