Active Shooter Response Training: Lone Wolf to Coordinated Attack, Second Edition, provides expanded and updated training for police and security officers who must respond to an active shooter situation. This manual addresses all facets of preparation and response, from complex logistical organization to collective and individual tactics, as well as special units or special skills tasks. Based on time-tested military training doctrine, the program described here offers a template for agencies of all sizes to offer training that effectively utilizes officers’ available time. Hyderkhan and his expert contributors cover all aspects of the active shooter response (ASR) mission, from risk analysis to logistical planning for mass casualty events. He also addresses medical care and evacuation, reunification procedures, and post-incident investigation. Active Shooter Response Training, Second Edition, provides the tools needed to prevent or mitigate tragedy in our religious congregations, schools, and public places. The book includes a voucher code for a 50% discount off of the companion online library of training videos This book is directed to law enforcement agencies, private security teams, training organizations, police leaders, and individual officers and trainers, in the US and globally. It also has potential as recommended reading in policing courses at the community college and university level.