While not as strong as those you have for your home, the Fourth Amendment of the U.S. Constitution offers protections against illegal searches and seizures of your motor vehicle by law enforcement officers at a traffic stop. A police officer generally needs probable cause, your consent, or a search warrant to search the inside of your vehicle. But if you leave an incriminating or suspicious item in plain view, you may be giving them exactly the probable cause they need. It’s a game of “I Spy With My Little Eye” that could well lead to a legal search of the vehicle.
The right of police officers to detect evidence of criminal activity or contraband (and no, it’s not just what they can see) can allow them to bypass a warrant requirement. As with most criminal laws, what officers can discern and how that affects your rights can vary under state statutes. It’s an issue that’s been before the U.S. Supreme Court (SCOTUS) numerous times, with rulings on unlawful searches and what constitutes “plain sight” that do as much to confuse as to clarify.
There’s a bit of common sense involved to avoid giving police what they need to execute a search of your vehicle. If you get pulled over with an open beer in your cupholder or a still-burning marijuana preroll perched in plain view in your ashtray, you might well be the architect of your own disaster. Without plainly detectible evidence that elevates law enforcement’s reasonable suspicion to probable cause, it’s unlikely they’ll have the standing to search your vehicle unless you serve it up to them.
No, It’s Not a Fork
Motorists do have an expectation of privacy in their vehicles, just not as strong as the protections the Fourth Amendment gives your home. That privacy still shields you from invasive, warrantless searches unless an exception applies. Under the Supreme Court’s ruling in Knowles v. Iowa, a routine traffic violation like speeding does not, by itself, give an officer probable cause to conduct a full search of your car. Unless the officer develops additional facts suggesting a crime (or you consent), they generally must let you go on your way after issuing the citation
Where drivers get into trouble is when they unintentionally hand officers probable cause on a silver platter. A pile of burglary tools on the back seat or an open gym bag stuffed with loose cash can be enough to make an officer reasonably believe a crime is afoot. Once officers have probable cause to think your vehicle contains evidence or contraband, the “automobile exception” to the warrant requirement usually lets them search the car without first going to a judge.
How the Plain View Doctrine Works
The Plain View Doctrine uses a three-prong test to determine if the “automobile exception” for a warrantless search doesn’t violate a driver’s constitutional rights. The elements are:
- Lawful Access: The officer must have a legal right to physically reach the item and seize it. Seeing something through a window is not a free ticket to tear your car apart; the officer’s path to the object still has to respect your remaining privacy interests. For example, an officer lawfully standing outside your door can usually open an already-open door further to grab a gun sitting on the seat, but not necessarily rummage through a closed container without some separate justification.
- Immediately Apparent: The incriminating nature of the item has to be obvious to a reasonable officer at the moment they perceive it. In Fourth Amendment terms, the sight (or smell, or sound) of the item must itself create probable cause that it is contraband or evidence of a crime. A plastic baggie stuffed with distinctive gray OxyContin pills can provide more than a “reasonable belief” that the driver is in possession of contraband. A container of brownies that may or may not contain marijuana would not.
- Lawful Presence: The officer must be legally in the position from which they see (or otherwise detect) the item. A standard traffic stop, a lawful approach to a parked car, or standing on a public sidewalk next to your vehicle are all typical examples. If the officer is somewhere they have no right to be, anything they discover is at risk of being suppressed as “fruit of the poisonous tree.”
If all three of these conditions aren’t met, any search conducted without your consent could be declared unconstitutional.
There’s a Lot of Legal Underpinnings to Traffic Stops
The Supreme Court first gave the plain view exception its definitive shape in Coolidge v. New Hampshire (1971). There, the Court discussed plain view as a narrow exception to the warrant requirement and suggested that valid plain-view seizures involve evidence discovered “inadvertently,” not as part of a pre-planned evidentiary hunt. That “inadvertence” idea created confusion about whether officers had to accidentally stumble onto evidence for the doctrine to apply.
The court cleared up that confusion 20 years later in Horton v. California (1990). It held that officers are not required to accidentally stumble upon contraband for a plain-view seizure. Instead, officers could seize illegal items in plain view during lawful law enforcement activities.
The “Plain View Doctrine” name is a bit misleading, as law enforcement is not limited to mere sight when detecting possible illegalities. All senses are included, and they don’t have to be human senses. A drug-sniffing dog's reaction can provide probable cause, as can noises coming from your trunk or the smell of alcohol on your breath.
However, the police are still limited by rulings like Arizona v. Gant (2009), where the discovery of cocaine in a car searched after the driver was already being detained for driving on a suspended license, which is a citation, was unconstitutional. On the other hand, a search after a “Terry Stop” that revealed marijuana in a car was deemed constitutional in Michigan v. Long (1983), so it’s safe to say it’s an ever-evolving and gray area of the law.
How To Avoid Becoming Part of a SCOTUS Ruling
The best way to avoid a parking-lot traffic stop from becoming an ongoing legal nightmare is to keep illegal or incriminating items out of plain sight in your vehicle. As we are imperfect creatures prone to having serious lapses in judgment, that’s not always going to be the case. There are a few things to keep in mind to make the best of a potentially life-altering situation.
First and foremost, even if you have nothing to hide, it’s not the best idea to consent to a search of your vehicle. Don’t be misled by an “only the guilty have something to hide” logical fallacy. If an officer at a traffic stop has probable cause to conduct a search, let them either get a warrant or take the risk of an inventory search of your car that will be deemed unconstitutional.
This doesn’t mean that your best approach at a traffic stop is to be belligerent or difficult. Your car’s windows may have a dark tint that makes it impossible to see inside, but you’re still going to have to open one at least a little bit to provide your driver’s license and other documentation. If your behavior is alarmingly suspicious, there’s a danger that you’re helping to provide probable cause.
If you don’t want the police to search your car, don’t leave anything accessible that would provide them with justification. This can vary due to your location. For example, having a legally-owned gun on the passenger’s seat in your car in California will elicit a markedly different reaction than it would in Texas. Having a closed container of cannabis in your cupholder in Maine likely won’t get you in trouble, but possessing it at all in Kansas is likely not going to go well for you. However, if it’s secured in the glove box when you’re pulled over for a traffic violation, it’s not subject to the Plain View Doctrine.
The Plain View Doctrine means just that - in plain view of one of law enforcement’s senses. The best way to avoid a warrantless but legal search of your vehicle is not to provide a reason for them to do so.
