What must an officer ensure when responding to a suspected drug overdose?

When responding to a suspected drug overdose, it is crucial for an officer to prioritize their own safety and call for medical assistance. This is because the circumstances surrounding a drug overdose can be unpredictable and may involve hazardous conditions, such as the presence of dangerous substances or volatile individuals.

By ensuring their own safety first, an officer can effectively assess the situation without putting themselves at risk of harm. Simultaneously, calling for medical assistance is vital because individuals experiencing a drug overdose require immediate medical attention to increase their chances of survival and to address any potential life-threatening conditions.

The other options, while they may seem relevant, do not prioritize the immediate needs of the situation effectively. Questioning witnesses without ensuring the scene is safe could put the officer at risk. Conducting a thorough search or waiting for backup can delay critical medical intervention that could save a life in an overdose scenario. Thus, the correct approach is to secure one's own safety and summon emergency medical help as a priority.