Final answer:
The correct answer to the question is option 2: 'Incident Commander - Bomb Squad/K-9 unit.' The Incident Commander has the responsibility to make critical decisions at the scene of a threat, and a specialized unit like a Bomb Squad or K-9 unit may be deployed for a comprehensive search.
Step-by-step explanation:
The question presents a scenario where a patrol officer is tasked with specific responsibilities at the scene of a potential explosive threat. The blank spaces in the statement should be filled respectively with the most suitable options provided, considering the capabilities and authority of different roles within law enforcement and emergency response teams. The appropriate choices would logically involve the individuals or teams most qualified to make decisions and take action regarding the search and safety of an area potentially compromised by explosives.
In the context of a threat potentially involving explosives, the Incident Commander often leads the operations, making critical decisions on whether to search using establishment personnel, evacuation plans, and further actions. When an advanced search is deemed necessary, the deployment of a specialized unit, such as the Bomb Squad or the K-9 unit specializing in explosives detection, may be considered. These units are trained to handle dangerous situations with the expertise to locate and deal with explosive devices effectively.
Thus, the correct answer to fill in the blanks would be: The Incident Commander must make the decisions, and the K-9 unit can be deployed to provide a comprehensive search for explosives as per the guidelines set out in LVMPD 3.525, which regards the use of Explosive Detector Dogs.