From the Document: "In this dynamic threat environment, it is imperative that organizations not only prepare their staff to respond to a potential incident, but also determine the processes through which recovery takes place. Developing recovery plans and procedures support organizations in more effectively reconstituting services and providing employees with the necessary support following an incident. The Office of Infrastructure Protection's 'Active Shooter Recovery Guide' assists in the proactive implementation of policies and procedures that best position organizations to most effectively recover from an active shooter incident, while providing the best support structure for their employees, contractors, visitors, patrons, family members, and the community at large. The primary principles of the guide are provided [herein]."
Cybersecurity and Infrastructure Security Agency: https://www.cisa.gov/