Colorado’s legalization of recreational marijuana under Amendment 64 changed more than just what adults over 21 can legally possess. It also changed how courts evaluate certain police searches, particularly those involving drug-sniffing dogs trained to detect marijuana alongside other substances.
Why a Dog Alert Alone May Not Be Enough
The Colorado Court of Appeals addressed this issue directly in a decision holding that when a drug-sniffing dog is trained to detect marijuana in addition to other substances, an alert from that dog is not automatically enough to justify a warrantless vehicle search. The court’s reasoning centered on a key problem: a dog trained to detect marijuana cannot distinguish between the possession of one ounce or less, which is legal for adults 21 and older under Colorado law, and larger quantities or other illegal substances.
As the court explained:
“Because Amendment 64 legalized […] marijuana by persons twenty-one years of age or older in Colorado, it is no longer accurate to say, at least as a matter of state law, that an alert by a dog which can detect marijuana […] can reveal only the presence of ‘contraband.’ A dog sniff could result in an alert with respect to something for which, under Colorado law, a person has a legitimate expectation of privacy, i.e., the possession of one ounce or less of marijuana for personal use.”
Reasonable Suspicion Still Matters
The court’s reasoning also touched on a separate but related issue: officers generally need reasonable suspicion before deploying a drug-sniffing dog in the first place, not just before searching based on the dog’s alert. Weak or circumstantial facts, such as a vehicle being parked near a location with a past connection to drug activity, may not be enough on their own to establish that reasonable suspicion.
When a search is found to lack the required legal justification, any evidence recovered as a result can potentially be suppressed, meaning it cannot be used against the defendant in court.
What This Means for Drivers in Colorado
This line of case law is an important reminder that legalization changed the legal landscape for vehicle searches involving marijuana-detection dogs. If you believe a search of your vehicle was conducted without proper legal justification, it’s worth discussing the specific facts of your stop with an experienced criminal defense attorney who can evaluate whether your rights were respected.
Frequently Asked Questions About Drug-Sniffing Dogs and Vehicle Searches
Can police still use drug-sniffing dogs in Colorado after marijuana legalization?
Yes, but if the dog is trained to detect marijuana along with other substances, an alert alone may not automatically justify a warrantless search, since the dog cannot distinguish legal personal-use amounts from other substances.
What does it mean for evidence to be “suppressed”?
Suppressed evidence is evidence that a court rules cannot be used in a criminal case, typically because it was obtained through an unlawful search or seizure.
What counts as reasonable suspicion for a vehicle search?
Reasonable suspicion requires specific, articulable facts suggesting criminal activity, not just a hunch or weak circumstantial connection. Courts evaluate this on a case-by-case basis.
What should I do if I think my vehicle was searched unlawfully?
Speak with a criminal defense attorney as soon as possible. They can review the specific facts of your stop and determine whether the search met the legal standards required under Colorado and federal law.
Written by
Shazam KianpourDenver Criminal Defense Attorney & Founder, Shazam Kianpour & Associates, P.C. — Over 10,000 criminal and traffic cases handled across Colorado.