Which line item about box containment is true?

• A. GOV-1 drives forward
• B. Requires a minimum of 3 USMS vehicles to be at a natural/complete stop
• C. Box containment can be performed without barriers
• D. GOV-2 drives forward, pinning the rear

Answer: (B)

Box containment relies on creating a stable, enclosed area around the suspect’s vehicle so officers can control the scene safely. To establish that perimeter effectively, you need enough units in the right positions and parked to stop, not to move. A minimum of three USMS vehicles needs to come to a natural or complete stop to form the box. With three vehicles parked, one can block the front while the other two flank and constrain the sides, giving you a defined space to work from and reducing the chance of the suspect maneuvering free. This setup also helps ensure you have the time and coverage needed to assess risks and plan the next steps.

Statements suggesting the first vehicle should drive forward would undermine the stationary perimeter you’re trying to establish. The idea that box containment can be done without barriers ignores the practical need to block and control possible escape routes. The notion that the rear is pinning by forward movement of another vehicle doesn’t reflect a stable, controlled box; it compromises safety and efficiency.