Law enforcement must have a lawful reason, such as a traffic violation or infraction, to legally pull you over. However, once that stop happens, everything becomes about what develops next: what you say, what the officers see, and what they smell. At SKA Law Group, attorney William Burrows and our experienced legal team understand how these encounters escalate and know how to vigorously defend your constitutional rights in Delaware County.

Building Probable Cause

Police officers methodically use observations during a traffic stop to establish probable cause. If an officer observes open containers, inconsistent statements, or drug residue, these aren’t just passing details—they are the building blocks used to justify a search. Once probable cause is on the table, it gives law enforcement the legal footing they need to potentially search your vehicle.

Warrantless Searches and Exigent Circumstances

If the police want to search your car without a warrant, the legal standard is highly protective of your privacy. Under the landmark Supreme Court decision in Commonwealth v. Alexander, law enforcement must prove that they had both probable cause and “exigent circumstances” (an unforeseen emergency requiring immediate action) to justify a warrantless automobile search. The court specifically ruled that the mere inherent mobility of a vehicle is no longer considered an exigent circumstance.

The Odor of Marijuana: No Longer a Free Pass

Now in Pennsylvania, the smell of marijuana alone does not provide the probable cause necessary to search a motor vehicle. Because medical marijuana is legally prescribed to many individuals, it is often impossible to tell from odor alone whether the possession is legal or illegal. While police can still use the smell of cannabis as one factor among others in a totality-of-the-circumstances analysis, they may not search your car in Delaware County solely because it smells like marijuana.

The Plain View Exception

There are exceptions to the warrant requirement, notably the “plain view” doctrine. If an officer is standing at a lawful vantage point—such as outside your driver’s side window during a valid stop—and it is immediately apparent that an object inside is contraband or evidence of a crime, they may have the lawful right to access and seize it without a search warrant.

Your Right to Refuse Consent

During a stop, an officer may ask to search your vehicle. If you give consent, you have just made their job much easier. It is perfectly legal and highly recommended to firmly state that you do not consent to a search. Refusing consent does not automatically end the inquiry, but it does force the police to legally justify their actions through probable cause and exigent circumstances later in court.

Fight Your Case with William Burrows and SKA Law Group

Anything found during a search does not just disappear—it becomes the evidence used to build a case against you. The time to challenge an illegal search is not on the side of the road; it is in the courtroom. If your vehicle was unlawfully searched in Delaware County, contact attorney William Burrows with SKA Law Group. Attorney Burrows will evaluate whether the police had the requisite probable cause and exigent circumstances, and fights aggressively in your favor.

FAQs: When Would a Traffic Stop Lead to Probable Cause for a Vehicle Search

Q: Can Delaware County police search my car without a warrant?

A: Generally, police need a search warrant to go through your vehicle. However, they can conduct a warrantless search if they have both probable cause to believe evidence is in the vehicle and exigent circumstances (an emergency situation), or if you grant them consent.

Q: Is the smell of marijuana enough for the police to search my car?

A: No. The Supreme Court has determined that the odor of marijuana alone does not establish probable cause to search a vehicle, although it can be evaluated as one factor among the totality of the circumstances.

Q: Can the police seize items they see looking through my car window?

A: Yes, under the “plain view” doctrine. If an officer is in a lawful position (such as standing next to your car during a valid traffic stop) and plainly sees something that is immediately apparent as contraband or illegal, they may seize it without a warrant.

Q: Do I have to let the police search my car if they ask?

A: No. You have the right to refuse the search of your vehicle. Saying no forces law enforcement to justify their search through probable cause, thereby protecting your Fourth Amendment rights