Making the Stop—When possible, stops should be coordinated beforehand with backup officers so that all those involved are utilizing the principle of mass and are on scene when the stop is initiated. The officer initiating the stop should position their vehicle further back than that of the unknown risk vehicle stop. For example, the officer may wish to position the squad car 20 to 25 feet behind the suspect vehicle and should ensure that it is parked in the most tactically advantageous position available and uses all available lighting to their advantage.
Officers' Coordination—Depending on the location, backup officers may choose to position their squad cars behind that of the officer who initiated the stop, either to the right or the left, and possibly blocking off the roadway completely for the safety of citizens. Once the vehicle has been stopped, the officers need to exit their vehicles and get behind cover. One logical location for cover is behind their own squad cars, where they have the engine block between them and the suspect vehicle.
Once officers are in position, it is important to work together and know each officer's individual responsibilities. For example, officers should ascertain which of them is responsible for managing the suspect or suspects as they are ordered from the vehicle, who will cuff and search the suspect or suspects, and who is responsible for maintaining cover while observing the vehicle for any other movement.
Giving Commands—The officer giving the orders should give loud and clear commands or use the PA system, ensuring the instructions are coherent and concise in order to guarantee that they are understood by the suspect or suspects. As soon as possible, it is important to set context. For example, after asking to see the driver's hands or asking the occupants to exit the vehicle with their hands up, it is important to be clear about the situation in its entirety by saying something like, "I have reason to believe that you are armed. If you make any sudden movements other than those that I tell you to make, I will consider that a direct threat to my life. Do not make any sudden movements or fail to follow any commands that I give you."
Suspect Management—The officer should then order the suspect toward the passenger side of the squad car. Once the suspect is about halfway back, order them to stop and turn around, while you are looking for weapons. Then, have the suspect continue to the back of your vehicle or to a designated location where officers can handcuff the suspect, check for weapons, and place them in a squad car. No more than one suspect should be dealt with at a time. If there are other occupants, the same procedure should be followed, one at a time. Officers should always assume there are others in the stopped vehicle. Commands should be given several times before approaching or attempting to clear the vehicle.