What is a likely communication from an officer who has completed their response to an incident?

The communication indicating that an officer has completed their response to an incident is "Arrived." This terminology is used to convey that the officer has reached the location of the incident, confirming their presence and readiness to engage in whatever task is necessary, whether it be assessing the situation, providing assistance, or conducting an investigation.

Once the officer has arrived, they effectively communicate that they are on site and have taken over any pertinent responsibilities associated with the incident. It provides a clear status update that can be relayed to dispatch or be visible to other officers involved in the situation.

While "On patrol" refers to being actively engaged in patrolling duties, it does not specifically indicate completion of an incident response. "Requesting case number" suggests the officer is still in the process of addressing the incident and has not yet completed their official duties. "Leaving the scene" would imply that the officer is departing before they have fully wrapped up their engagement with the incident, which does not properly represent a communication indicating that their response is complete.