Can Police Search a Car for the Smell of Weed in Illinois? Raw Yes, Burnt No

Illinois is the one state where the answer depends on what the car smells like. The Illinois Supreme Court decided two cases the same year and came out opposite ways — and both are right.

Can Police Search a Car for the Smell of Weed in Illinois? Raw Yes, Burnt No

Burnt cannabis odor alone is not probable cause (People v. Redmond, 2024 IL 129201). Raw cannabis odor alone is, for an officer trained and experienced in telling the two apart, when the vehicle is on an Illinois highway (People v. Molina, 2024 IL 129237) — because Illinois law requires cannabis in a car to be in an odor-proof container.

Illinois: odor and the car — Burnt odor alone isn't probable cause. Raw odor alone is. Both Supreme Court cases, 2024. — Illinois: odor and the car — the statute, the controlling cases, and what still gets you into the car. The full breakdown lives inside StreetSense, offline.

Burnt odor — Redmond

“The odor of burnt cannabis, standing alone without other inculpatory facts, does not provide probable cause to search a vehicle.” 6–0. The old Stout rule is invalid for searches on or after January 1, 2020.
Why: burnt odor “is not a sufficiently inculpatory fact that reliably points to who used the cannabis, when the cannabis was used, or where the cannabis was used.”
It still gives you something: the strong odor of burnt cannabis “certainly established reasonable suspicion to investigate further.” Probable cause needs more — signs of impairment, paraphernalia, smoke or a lit product, the odor on the person. In Redmond, “drug corridor” testimony and evasive answers added nothing.

Raw odor — Molina

“The odor of raw cannabis coming from a vehicle being operated on an Illinois highway, alone, is sufficient to provide police officers, who are trained and experienced in distinguishing between burnt and raw cannabis, with probable cause.” 4–2.
The reason is the Vehicle Code: “while cannabis is legal to possess generally, it is illegal to possess in a vehicle on an Illinois highway unless in an odor-proof container.” If you can smell raw cannabis, the container isn’t odor-proof.
Expect cross on your training. In Molina the trooper first testified the odor was burnt, then corrected himself after reviewing his report. Document what you smelled, raw or burnt, and your training to tell the difference.

The container law — and what changed in 2026

625 ILCS 5/11-502.15: cannabis in a vehicle must be in a “secured, sealed or resealable, odor-proof, child-resistant cannabis container that is inaccessible.” Class A misdemeanor.
P.A. 104-463, effective June 12, 2026, re-enacted that section and kept the odor-proof requirement — so Molina’s basis stands. It added one exception: dispensary cannabis in its original sealed, odor-proof, child-resistant package no longer has to be inaccessible (410 ILCS 705/15-85(e)).
Possession limits doubled in the same act. Residents: 60 grams of flower, 10 grams of concentrate, 1,000 mg of THC in products. Non-residents: 30 g, 5 g and 500 mg.
Pending, not law: SB 125, which would have made odor alone insufficient, died in January 2025. Its successor, SB 42, passed the Senate and has sat in House Rules since May 2025. Watch it.

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.
The Seventh Circuit — which covers Illinois — held in United States v. Jackson, 103 F.4th 483 (7th Cir. 2024), that “the smell of marijuana alone justifies a Fourth Amendment search.” That controls federal prosecutions. It was decided before Redmond, and it does not govern suppression of a state case in an Illinois court.
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

You stop a car on the interstate for following too closely. Two scenarios. One: the cabin smells of burnt cannabis, the driver is steady and clear, nothing is in view. You have reasonable suspicion to ask questions and look for impairment — not a search. Two: the cabin smells strongly of raw cannabis. If you are trained to tell raw from burnt, Molina gives you probable cause. Write down which it was, and why you know.

Frequently asked questions

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

It depends on the odor. In People v. Redmond (2024) the Illinois Supreme Court held that the odor of burnt cannabis alone is not probable cause to search a vehicle. In People v. Molina (2024) it held that the odor of raw cannabis alone is probable cause for a trained officer, because Illinois requires cannabis in a vehicle to be in an odor-proof container.

How do you legally carry weed in a car in Illinois?

Under 625 ILCS 5/11-502.15, cannabis in a vehicle must be in a secured, sealed or resealable, odor-proof, child-resistant container that is inaccessible. Since June 12, 2026, dispensary cannabis in its original sealed, odor-proof, child-resistant package does not have to be inaccessible. A violation is a Class A misdemeanor.

How much weed can you have in Illinois in 2026?

Since June 12, 2026, Illinois residents 21 and over may possess up to 60 grams of cannabis flower, 10 grams of concentrate and 1,000 mg of THC in cannabis-infused products. The limits for non-residents are half of that.

Carry the rule, not the guesswork. StreetSense breaks down Illinois 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.

Spot an error? Email nick@mnsindustriesllc.com with the post and your source. Corrections to the app go out over the air. How we verify.