Colorado Drug Possession Lawyer

Charged with drug possession in Colorado? Maybe pills turned up during a traffic stop, a small amount of meth or fentanyl was found in the car, or police searched a backpack. Whatever happened, the first question is usually the same: is this a felony, and will it follow me for the rest of my life?

I’m Monte Robbins, a Colorado criminal defense lawyer with more than 20 years of experience. I defend drug possession charges in courts across Colorado, from drug misdemeanors to felony possession, and I personally handle every case.

How Colorado Classifies Drug Possession

Colorado uses its own categories for drug crimes: drug misdemeanors (DM1 and DM2) and drug felonies (DF1 through DF4). For simple possession, the charge usually depends on the drug and the amount:

A level 4 drug felony is the lowest felony level for drug crimes. Larger amounts, and charges of possession with intent to distribute, are more serious.

The weight lines matter. The difference between DM1 and DF4 can come down to fractions of a gram, so how the substance was weighed and tested is often worth a close look.

A Drug Felony Can Become a Misdemeanor

This is the part many people don’t know. Under Colorado law (C.R.S. 18-1.3-103.5), for certain drug felonies, if you successfully complete probation or community corrections, including any court-ordered treatment, the court vacates the felony and enters a level 1 drug misdemeanor instead. It applies to:

• Fentanyl possession charged as a level 4 drug felony (more than 1 gram, up to 4 grams)
• Small amounts of ketamine, GHB, cathinones, or flunitrazepam
• Possession of more than 12 ounces of marijuana or more than 3 ounces of concentrate
• Certain other low-level drug felonies, including obtaining drugs by fraud or deceit

It does not cover every drug felony. For example, possession of more than 4 grams of meth, heroin, or cocaine isn’t on the list, although other paths, like a deferred judgment, may still be possible.

There are exceptions. It isn’t available to someone with a prior conviction for a crime of violence, someone who isn’t eligible for probation, or someone with two or more prior felony drug convictions (which, for this purpose, can include deferred judgments).

Depending on the case and your history, other paths may also be possible, such as a deferred judgment or diversion that can end in dismissal, or a plea to a lower charge.

How Possession Charges Come About

• Traffic and DUI stops, where a search turns up drugs in the car. If you were also charged with driving under the influence of drugs, see my Colorado DUI Drugs Lawyer page.
• Passengers and shared cars, where police charge everyone near the drugs.
• Pills without a prescription, or pills in someone else’s prescription bottle.
• Searches of homes, backpacks, or purses.

One thing to know: Colorado law doesn’t allow an arrest or charge based only on tiny, unusable residue in used needles, syringes, or other paraphernalia.

Field Drug Tests: New Protections in 2026

The roadside color-change test officers use to identify drugs (a “colorimetric field test”) is known to give false positives. A Colorado law that took effect March 26, 2026, reflects that:

• No arrest based only on a field test for a DM1. If a field test was used and the only basis is a level 1 drug misdemeanor possession charge, the officer has to issue a summons instead of arresting you.
• A required warning before any plea. Before accepting a guilty plea in a possession case where a field test was used, the judge must advise you that these tests have known error rates, give false positives, and aren’t admissible in court, and that you have the right to plead not guilty and ask for testing by an accredited lab.

If your case rests on a field test, that’s often the first thing worth challenging.

How Drug Possession Charges Are Defended

• Was the search legal? Many possession cases start with a search. If the stop was extended without a good reason, the consent wasn’t voluntary, or there was no probable cause, the evidence may be suppressed.
• Were the drugs actually yours? In a shared car or home, the prosecution has to prove you knowingly possessed them, not just that you were nearby.
• What was it, and how much? Lab testing and weight can make the difference between a misdemeanor and a felony.
• Did you know it contained fentanyl? If you had pills you believed were something else, Colorado law lets the jury find it was a reasonable mistake. That drops a DF4 fentanyl charge to a DM1.
• Did you have a valid prescription?

How a case resolves depends on the evidence, your history, and the mitigation we can show, such as treatment.

Marijuana and Psilocybin in Colorado

Adults 21 and over can legally possess up to 2 ounces of marijuana, and Colorado’s 2022 natural medicine law made personal possession of psilocybin mushrooms legal for adults 21 and over. But both can still lead to charges: possessing over the legal limits, being under 21, selling outside the licensed system, or taking marijuana out of Colorado. If you were charged with driving high, see my Colorado Marijuana DUI Lawyer page. For drivers on I-76, see my Logan County Traffic Lawyer page.

Can a Drug Case Be Sealed?

Often, yes. Many Colorado drug convictions can be sealed after a waiting period, and dismissed cases can usually be sealed sooner. See my Criminal Record Sealing page.

Frequently Asked Questions About Drug Possession in Colorado

Talk to a Colorado Drug Possession Lawyer

Call me at 303-355-5148 or contact my office for a free consultation. You’ll speak with me, not a staff member.