What is the purpose of establishing an outer perimeter at a barricade situation?

The purpose of establishing an outer perimeter at a barricade situation is primarily to contain the situation and protect civilians. Setting up an outer perimeter helps ensure that those who are not involved in the incident, such as innocent bystanders or nearby residents, are kept at a safe distance from potential harm or crossfire. This containment secures the area so that emergency responders can manage the situation effectively without risking civilian safety.

Moreover, an outer perimeter allows law enforcement to control access to the scene, which is vital for the safety of both the public and the officers involved. By restricting entry into the area, officers can better monitor and assess the situation, manage resources, and prepare for any necessary tactical operations. This step is essential for crime scene integrity and helps in establishing a safe environment for ongoing operations.