The Offset File — Recommended Approach
- —Officers move in a staggered (not shoulder-to-shoulder) file
- —Each officer has an assigned sector of responsibility
- —Reduces the likelihood of muzzles crossing teammates
- —Easier to maneuver through doorways and narrow hallways
Sector Discipline:
- —Front officer: forward threat
- —Second officer: opposite side doors and support
- —Third officer: rear security or opposite hallway
- —Fourth officer: rear security and communication
Key Principles
Maintain Spacing
Avoid bunching. One burst of gunfire should not affect multiple officers. Spacing improves reaction time and fields of fire.
Use Angles Instead of Width
Rather than spreading across the hallway, use depth. This creates overlapping observation without overlapping lines of fire.
Dynamic Movement
The formation should expand, contract, or temporarily split as needed. Doorways, intersections, and corners require adaptation.
Verbal Communication
"Left!", "Right!", "Rear!", "Cross!", "Moving!" — short commands prevent confusion and clarify sector ownership.
The T-Formation — Pros and Cons
Advantages
- —Excellent forward and lateral observation
- —Useful for deliberate, methodical searches
- —Good command and control for the lead officer
Disadvantages
- —Crossfire remains a concern
- —Wide footprint — harder to maneuver corners
- —Doorway bottlenecks
- —Not ideal for 1–3 officer patrol responses
Current Patrol Trend
The trend in patrol active shooter response is toward adaptive movement rather than fixed formations. Instead of "always use a diamond" or "always use a T," instructors emphasize:
- —Assigned sectors of responsibility
- —Offset file or staggered movement
- —Maintaining spacing
- —Rapid movement to the threat
- —Continuous communication
- —Flexibility to expand, contract, or split as the environment dictates