What action can be taken after a fire investigator completes their work at a fire scene?

Once a fire investigator has completed their assessment of the fire scene, the next step is often overhaul. This involves a thorough examination and removal of any smoldering materials to prevent rekindling and to ensure that the fire is completely extinguished. Overhaul allows firefighters to search for hidden fire extensions and check for potential hazards that may not have been initially apparent during the active firefighting phase.

This phase is important for the protection of property and safety of those involved, as it helps ensure that the area is fully secure and that there are no residual risks. While activities such as ventilation or demobilization may be appropriate actions taken during or after firefighting operations, they do not follow the completion of an investigator's work in the same way that overhaul does. Inventory might be related but is not a direct action to follow the investigator’s role in the scene. Thus, overhaul stands out as the correct and relevant action to be taken after the fire investigation concludes.