Vehicle Search - Training -

Vehicle Search

Get it right



Laura L. Scarry | From the February 2008 Issue Wednesday, January 30, 2008

A large part of a police officer's job is conducting traffic stops and issuing citations. Often, officers are confronted with situations that allow them to search vehicles they stop. However, many officers, after they have conducted a lawful search, cite the wrong legal theory to support that search when drafting their police reports. For example, an officer who searched a vehicle and found marijuana in the center console may write in the report that they conducted an inventory search, when in fact the officer conducted a search incident to a lawful arrest.

It s important for officers to understand the various legal theories that form the basis of a vehicle search, particularly when it comes to drafting police reports or testifying in court.

Of course, any time an officer physically enters a vehicle (as opposed to standing outside the vehicle and looking in) the officer has conducted a search. Example: An officer who reaches into a vehicle to physically remove papers from the dashboard in order to view the vehicle identification number (VIN) has conducted a search.1 On the other hand, standing outside a vehicle and looking at the VIN without reaching in to the vehicle to move anything to see the VIN is not a search. The latter is often referred to as the open view or plain view doctrine, which is an exception to the warrant requirement. In the former scenario, the officer must justify the reason for the search.

In this article, in very general terms, I ll discuss the various theories that police officers can use to search a vehicle after they have conducted a lawful traffic stop, including

  • Probable cause (automobile exception);
  • Emergency;
  • Search for weapons;
  • Search incident to arrest;
  • Inventory; and
  • Consent.

Probable Cause

Officers can search vehicles after a lawful traffic stop on probable cause alone that is, without having to get a warrant.2 The general reason is because one has a lesser expectation of privacy in a motor vehicle [as] its function is transportation and it seldom serves as one s residence or the repository of personal effects 3; this is otherwise known as the automobile exception.

Example: Officers lawfully stop a vehicle. One officer shines a flashlight into the car and notices the driver move his hand from his pocket and drop a knotted party balloon beside his leg. From prior experience, the officer knows that drugs are often packaged in such a manner. Another officer sees several plastic vials with white powder and an open bag of party balloons inside the open glove compartment. The first officer reaches into the car, picks up the balloon and notices a powdery substance on it.

In this case, the officers have probable cause to reach into the vehicle because it s reasonable to believe the driver possesses illegal drugs. No warrant is required because under the automobile exception, the vehicle may be gone by the time an officer returns with a warrant, and the occupant has a lesser expectation of privacy. This would also be the case if an officer smelled the odor of marijuana coming from the vehicle while talking to the driver. Probable cause may be formed by information gained from any or all of your senses.


The best example of an emergency vehicle search is when officers enter a vehicle to rescue an infant or an animal left inside a vehicle causing distress due to extreme heat and/or cold. Under such circumstances, police officers don t need a warrant to enter the vehicle.

Search for Weapons

Officers can search a vehicle and its occupants if they have reasonable suspicion to believe the occupants might be armed with a weapon. The United States Supreme Court in Terry v. Ohio4 held that officers may conduct a pat-down search of a suspect while they re detained when they fear for their safety.

A Terry search can also be conducted of automobiles if there s reasonable suspicion to believe a weapon is inside. However, officers can only search the areas where they have reasonable suspicion to believe there s a weapon the occupant can gain immediate control of.5

Search Incident to Arrest

If the driver of the vehicle is lawfully arrested, police officers may search the arrestee and the passenger compartment of the vehicle. In other words, officers may lawfully search the arrestee, his pockets, any containers inside his pockets, the passenger compartment of the vehicle and any closed containers within the passenger compartment.6 Police officers may not search the trunk under this theory.

However, this doesn t mean officers can never search the trunk. It simply means that if officers are conducting their vehicle search under the search incident to arrest theory, they can t search the trunk under that theory. On the other hand, if during the search incident to an arrest they find probable cause to conduct a search of the trunk, they can do so under the automobile exception noted above.


Inventory searches have been deemed reasonable because they re administrative in nature and aren t investigative searches for crime-related evidence. Inventory searches serve three administrative purposes: the protection of the owner s property while it remains in police custody, the protection of the police against claims or disputes over lost or stolen property and the protection of the police from potential danger. 7

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Laura L. ScarryLaura L. Scarry, Law Officer's Legal Eagle columnist, is a partner in the law firm of DeAno & Scarry, with offices located in Wheaton and Chicago, Ill.


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