Can Police Search a Car for the Smell of Weed in Vermont? One Factor, Never the Whole Case

Vermont never wrote an odor statute. The Vermont Supreme Court built the rule in three cases decided in 2019 and 2020 — and all three came from stops made before adults could legally possess marijuana.

Can Police Search a Car for the Smell of Weed in Vermont? One Factor, Never the Whole Case

Not on odor alone. Under Article 11, “an odor of marijuana is a factor, but not necessarily a determinative factor, as to whether probable cause exists” (Zullo v. State, 2019 VT 1). A faint smell of burnt marijuana alone didn’t justify seizing a car (Zullo) or expanding a stop (State v. Nagel, 2020 VT 31), and raw odor plus a surrendered lawful amount wasn’t probable cause to seize the car (State v. Clinton-Aimable, 2020 VT 30). We found no Vermont Supreme Court decision on odor since adult possession became legal on July 1, 2018.

Vermont: odor and the car — Odor is a factor, not probable cause. Even with probable cause, you need exigency or a warrant. — Vermont: odor and the car — the statute, the controlling cases, and what still gets you into the car. The full breakdown lives inside StreetSense, offline.

Zullo (2019) — a factor, not the answer

A civil Article 11 suit over a 2014 stop (Zullo v. State, 205 A.3d 466). A faint smell of burnt marijuana plus masking items — an air freshener, eye drops — justified an exit order “to determine whether plaintiff was driving impaired.”
But seizing the car to hold it for a warrant, “essentially based solely on the trooper’s initial detection of the faint odor of burnt marijuana,” violated Article 11. That odor “did not, in and of itself, create a fair probability that marijuana would be found in the vehicle.”
The Court called a faint burnt smell “far less probative” than “an overpowering odor of fresh marijuana emanating from the trunk.” That was a comparison, not a holding that strong or fresh odor is probable cause.

Nagel (2020) — faint odor won't expand the stop

Nagel (4–0), an October 2017 stop: the “faint smell of burnt marijuana” “has limited probative value and will not, by itself, support the State’s seizure of a defendant’s vehicle.” Footnote 2: it “did not support reasonable suspicion, much less probable cause.”
The stop was unlawfully expanded into a drug investigation, and consent given after the sheriff wrongly claimed probable cause to seize the car and “do up” a warrant was invalid. (The State had conceded no reasonable suspicion.)

Clinton-Aimable (2020) — raw odor and a lawful amount

July 2016 stop, decided 5–0 under the Fourth Amendment and Article 11. The officer smelled raw marijuana; the driver handed over less than an ounce. Add aerosol cans, a rental car, a vague travel story and extreme nervousness. No probable cause to seize the car, and the warrant search that followed was suppressed.
Odor still counts: “Simply because possession of small amounts of marijuana is not a crime does not require law enforcement to disregard the odor of marijuana in establishing probable cause.” But “the smell of marijuana alone will not always be enough.”
The core of it: the Court could not accept that “the presence of an amount of marijuana that is not a crime to possess is sufficient to establish probable cause that defendant possessed additional marijuana in criminal amounts or drugs other than marijuana.”

Even with probable cause — exigency or a warrant

State v. Bauder, 2007 VT 16 (3–2): the automobile exception under Article 11 “requires a showing of both probable cause that the vehicle contains evidence of a crime, and exigent circumstances.” It quotes State v. Trudeau (1996): “no amount of probable cause can justify a warrantless search or seizure absent exigent circumstances.”
Mobility “is not per se an exigent circumstance” (State v. Savva, 1991).
With probable cause you may seize and hold an unoccupied car for a reasonable time while you get the warrant (State v. Platt, 1990).

What no court has decided

We found no Vermont Supreme Court decision since July 1, 2018 deciding whether raw, fresh or strong odor supplies probable cause. Zullo, Nagel and Clinton-Aimable all arose from earlier stops.
No statute fills the gap: the cannabis, vehicle and police chapters never use the words “odor” or “smell.” Lawful adult possession “shall not be penalized or sanctioned in any manner by the State” (18 V.S.A. § 4230a(a)(1)) — a penalty rule, not a search rule.
Dogs: in Zullo (2014 facts) a certified dog’s two alerts on the trunk, with other indicia, supported the warrant. We found no Vermont decision on marijuana-trained dogs after legalization.

How much is legal, and in the car

Since July 1, 2026 (2026 Act 176), adults 21 and over may possess two ounces or less of cannabis or 10 grams or less of hashish (18 V.S.A. § 4230a(a)(1)). The old 1-ounce limit is gone. Under 21, an ounce or less is a civil violation (7 V.S.A. § 656).
In the car: an operator who consumes cannabis — including secondhand smoke in the vehicle — faces a civil penalty up to $500; an operator or passenger with an open container in the passenger area, or a passenger consuming, up to $200 (23 V.S.A. §§ 1134, 1134a). An unlocked glove compartment is passenger area.
Using cannabis in a vehicle with a child under 18 aboard is a misdemeanor, fine up to $500 for a first offense (§ 1134b). DUI is 23 V.S.A. § 1201; legalization doesn’t touch it (§ 4230a(b)(2)).

The federal floor — and why it doesn't decide your case

Under the Fourth Amendment the automobile exception needs probable cause and nothing more (Maryland v. Dyson, 527 U.S. 465 (1999)), and marijuana is still illegal under federal law.
Vermont’s Article 11 goes further: odor is one factor in the totality, and even probable cause needs exigency or a warrant.
That is the floor. A state court applying its own statute or constitution can — and here does — suppress what a federal court would admit. Work to your state’s rule.

How it plays out on the street

Stop for an equipment violation. Faint smell of burnt marijuana, an air freshener, eye drops on the console. That’s Zullo: enough to ask the driver out and check impairment — not enough to seize the car. If the driver hands over a small bag, Clinton-Aimable says a lawful amount doesn’t prove there’s more. Ticket written and no impairment? Release. If you do build probable cause, hold the car and write the warrant unless you can name a real exigency.

Frequently asked questions

Can police search your car for the smell of weed in Vermont?

Not on the smell alone. In Zullo v. State (2019) the Vermont Supreme Court held that the odor of marijuana is a factor, but not necessarily determinative, in deciding probable cause, and that a faint smell of burnt marijuana did not by itself justify seizing a car. Even with probable cause, a warrantless vehicle search in Vermont needs exigent circumstances (State v. Bauder, 2007).

Has Vermont ruled on marijuana odor since legalization?

We found no Vermont Supreme Court decision applying the odor rule to a stop made after July 1, 2018, when adult possession became legal. Zullo (2019), Nagel (2020) and Clinton-Aimable (2020) all arose from earlier stops, and each treated odor as one factor rather than probable cause on its own.

How much weed can you have in your car in Vermont?

Since July 1, 2026, adults 21 and over may possess two ounces or less of cannabis or 10 grams or less of hashish. An open container of cannabis in the passenger area is a civil violation with a penalty of up to $200.

Carry the rule, not the guesswork. StreetSense breaks down Vermont law like this — the statute, the limit, and the charge that actually sticks — verified against the code and available fully offline on shift. Start the free trial.

StreetSense is an educational reference for law enforcement, not legal advice. State law changes, and your department policy may be stricter than the statute. Always follow your state’s current rule and your agency’s policy.

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