Active Shooter Training for Law Enforcement: From Open Air to Structure

Active Threat Training

Grey Group’s Active Shooter Training prepares law enforcement to respond to active threats in schools, public venues, and open-air environments. Training focuses on Phase 1, 2, and 3—stop the threat, stop the dying, and stop the bleeding—while developing skills in solo response, team linkups, and safe movement through corridors.

Designed for patrol officers, SROs, and tactical personnel seeking to build immediate action skills and deliver training within their agency.

If you have questions or would like more information, please send an email to contact@greygroupsecurity.com

This was a tough course, as it should be. I really enjoyed the course and everything we worked on. The instructors were great at giving individual feedback and answering questions and explaining tactics further as well as providing personal experiences and applying those experiences to what we were learning was excellent. Thank you for this course, I would highly recommend it!

R. Ruzich

Student

Active Threat Instructor Course

This 4-day Active Threat Instructor course equips law enforcement officers to respond to active threat incidents and deliver training within their agency. Training covers Phase 1, Phase 2, and the transition to Phase 3, with emphasis on vehicle-based ambush attacks upon arrival, current threat trends, and immediate action priorities—stop the threat, stop the dying, and stop the bleeding. Through hands-on scenarios, force-on-force, and lectures, officers develop decision-making skills with a key focus on rapidly removing injured individuals to safety. Heavy focus on instructor development.

Core Training Topics

Phase 1, 2 & 3 Response Framework
Vehicle-Based Ambush Response on Arrival
Current Active Threat Trends & Intelligence
Solo Response & Team Linkup Procedures
Force-on-Force Scenario Training
Stop the Bleeding / Tactical Medicine
Rapid Casualty Evacuation Techniques
Instructor Development & Curriculum Delivery
Safe Movement Through Corridors & Structures

Required Equipment

Duty Pistol and Rifle with chamber blockers
Ballistic Body Armor & Helmet
Eye Pro, Hearing Protection, Gloves
150 rounds NTLA/SIMs or Airsoft
PPE Gear: head, neck, groin for FOF
Radio
Tourniquet & Basic Trauma Kit
Grey Group does not provide ammo or SIMs

Upcoming Active Shooter Interdiction Instructor

JUN 1 – 4, 2026

Normal, IL

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Some of the key takeaways from the training included learning not to enter a room if the threat can be addressed from the doorway, the importance of taking controlled breaths throughout a high stress situation, and mastering fundamentals like proper footwork and effective positioning. While I hope I never have to apply these skills in a real world incident, the training gave me the confidence that I would be prepared to respond effectively during an active assailant situation if required.

Florida Department of Law Enforcement (FDLE) badge displayed at a STAR Training session hosted by Grey Group.

D. Burgess

Student

S.T.A.R. SRO Tactical Assailant Response

The SRO Tactical Assailant Response (S.T.A.R.) course prepares school resource officers with critical solo-response skills for active threats. Over three days, it blends tactical training, decision-making, and force-on-force scenarios, with a strong focus on use-of-force judgment and de-escalation.

Officers train across real school environments—hallways, rooms, stairwells, crowded areas, and exterior spaces—handling threats ranging from unarmed individuals to active attackers. The course emphasizes threat isolation, precision engagement near bystanders, and meeting Critical Task Evaluation standards.

Core Training Topics