What is the initial action for the On Scene Commander (OSC) at a barricaded suspect situation?

Establishing a 360-degree perimeter is a critical initial action for the On Scene Commander (OSC) in a barricaded suspect situation because it ensures a comprehensive analysis of the scene and provides a secure environment to manage the incident. This perimeter allows the OSC to gather vital situational information, observe for any potential threats, and protect bystanders as well as responding personnel. By assessing the landscape and locking down the area, the OSC can better coordinate efforts to approach the situation safely and effectively.

Additionally, having a 360-degree view of the situation facilitates communication and planning with the tactical teams and support units, ensuring that all possible escape routes and vantage points of the suspect are accounted for. This strategic positioning is essential in determining the most effective course of action moving forward, such as whether negotiation can be attempted or whether additional resources are needed.