Missouri Marijuana Convictions May Linger Despite Clearing Deadline

Thousands of Missourians may still be carrying marijuana convictions that the state ordered erased years ago, and a recent appellate ruling has exposed that nobody agrees on how to fix it.

When voters approved Amendment 3 in November 2022, they wrote recreational marijuana into the Missouri Constitution along with one of the broadest record-clearing mandates in the country. Circuit courts were directed to find and automatically erase eligible marijuana misdemeanors by June 8, 2023, and eligible felonies by December 8, 2023, with no petition, hearing, or fee required. People granted expungement are supposed to be treated as if the arrest and conviction never happened.

But the promise of “automatic” relief has collided with how courts actually carried it out. In a St. Louis case decided in April 2026, the Missouri State Highway Patrol told the Court of Appeals Eastern District that “hundreds of thousands” of marijuana offenses may still sit on criminal records that should have been cleared. The patrol offered no proof, and the judges flagged that gap directly: “no evidence of these claims was presented to the circuit court,” the opinion noted. The case still laid bare a problem the amendment never solved — what happens when a court simply misses an eligible record.

A ruling with no clear remedy

The appeal centered on a St. Louis man, identified in court records only as D.S., who asked a judge to expunge a 2003 misdemeanor marijuana conviction. A St. Louis County circuit judge granted it. The highway patrol did not dispute that the old conviction qualified; it argued the court had no authority to act, because the constitution made misdemeanor expungement automatic and reserved the petition process for people still incarcerated. Letting everyone else petition, the patrol warned, would flood the courts.

The appellate judges split the difference. They agreed the circuit court overstepped by hearing the petition, but they upheld the expungement anyway, reasoning that the court had been constitutionally obligated to clear the record back in 2023. The Missouri Independent reported that the decision is already rippling through the system: people whose records were never cleared have filed petitions in St. Louis County, only to see them dismissed.

That leaves a confusing menu of options for anyone whose case slipped through. St. Louis County is now telling people to file under Missouri’s ordinary criminal expungement law rather than the marijuana amendment, a route that matters because state law lets a person clear only three misdemeanors in a lifetime. Forcing someone to spend one of those on a conviction the constitution already said should vanish struck the appellate judges as wrong, and it alarms defense attorneys.

“This is a mess,” said Lee Camp of ArchCity Defenders, the firm that represented D.S. Camp argues the better fix is a court order compelling officials to finish the job the constitution assigned them, a remedy the amendment never spelled out but that he says due process requires.

How many records remain

Missouri’s courts have expunged roughly 155,000 marijuana cases since legalization, according to the state courts system. Officials estimate about 334,000 cases have been reviewed, meaning roughly 46 percent of reviewed cases were cleared. Clerks say even that figure understates the work, because paper files deemed ineligible were never logged.

The gaps trace back to how the search was built. In 2023, the Office of State Courts Administrator handed clerks computer-generated lists of potentially eligible offenses. Those lists left out people who were under 21 at the time of arrest and skipped paper records, which in many counties run up to around 2014. The amendment never specified how far back courts had to look; clerks have said they reached to 1971, the year of Missouri’s first marijuana statutes, based on guidance from state administrators. Older cases sitting in courthouse boxes still have to be read by hand, one file at a time.

Other states that legalized later built cleaner record-clearing systems. Maryland, for instance, pardoned the marijuana convictions of about 100,000 people in a single 2024 order.

Dan Viets, a defense attorney who helped draft the amendment’s expungement language and coordinates Missouri NORML, once estimated that hundreds of thousands of cases might remain, but he has since walked that back. The flood of petitions the highway patrol feared never materialized, he notes, which undercuts the argument that allowing people to petition would overwhelm the courts.

A shifting target for relief

Even as old records linger, the pool of eligible offenses has narrowed. In a July 2025 decision, the Missouri Supreme Court held that a gun-possession charge tied to a marijuana arrest was a weapons offense, not a marijuana offense, and therefore could not be expunged. Viets and other advocates warn that the court’s reasoning limits eligibility to cases involving three ounces or less, a far tighter line than the three-pound threshold written elsewhere into the amendment.

For the people still waiting, the stakes are concrete. A lingering conviction can be the difference in a job application, a lease, or a benefits decision — exactly the collateral harm the expungement mandate was meant to undo. Alaska, by contrast, recently chose to shield old marijuana convictions from public release rather than force people to chase down clearances. Missouri’s struggle echoes the patchwork playing out nationally, where the promise of relief often outpaces the machinery built to deliver it.

For now, Missourians who believe an eligible case was missed are told to start with their circuit clerk. Whether that produces a consistent statewide fix, or whether it takes a court order to force one, remains unsettled.