Last verified: March 2026
A National First — By Popular Vote
When Missouri voters approved Amendment 3 in November 2022, they did not just legalize recreational cannabis. They made Missouri the first state in American history to adopt automatic cannabis expungement by popular vote. The constitutional amendment required the state to review and expunge qualifying cannabis-related criminal records without individuals having to petition the courts themselves.
The promise was extraordinary. The execution has been complicated.
What Amendment 3 Required
Amendment 3's expungement provisions were specific and ambitious:
- Automatic review of all cannabis-related criminal records in Missouri
- Expungement of qualifying offenses without the individual needing to petition a court
- Constitutional deadlines for completion of the review process
- Release consideration for individuals currently incarcerated, on probation, or on parole for cannabis offenses (565 identified as eligible)
The Process: 307,000 Cases
The DCR and Missouri courts undertook a massive review of cannabis-related criminal records statewide. The scale was enormous:
- 307,000 total cases identified for review
- 140,000+ cases cleared through expungement or dismissal
- 46% clearance rate of all reviewed cases
- Remaining cases either did not qualify, involved other concurrent charges, or required further review
The Complications
Missed Constitutional Deadlines
Amendment 3 established specific deadlines for completing the expungement review. The state missed both constitutional deadlines. The sheer volume of cases, the complexity of identifying qualifying offenses in records that span decades, and the lack of resources allocated to the effort contributed to the delays.
Paper Records (Pre-2014)
Cases from before 2014 were particularly challenging because many existed only as paper records. Missouri's courts did not fully digitize their records until 2014. Expunging pre-2014 cases required manual review of physical court files — a labor-intensive process that contributed significantly to the missed deadlines.
The Supreme Court Narrowing
In a decision that drew sharp criticism from advocates, the Missouri Supreme Court narrowed the scope of automatic expungement to offenses involving 3 ounces or less. This interpretation excluded many cannabis convictions that Amendment 3's drafters and supporters believed should qualify.
Veteran cannabis attorney Dan Viets (Missouri NORML chair) called the ruling "judicial activism" — arguing that the court substituted its own reading of the amendment for the clear intent of the voters. The narrowing left an unknown number of individuals with cannabis records that advocates believe should have been cleared under the plain language of Amendment 3.
If you have a cannabis-related conviction in Missouri, you may be eligible for expungement even if you were not part of the automatic review. Contact the DCR at 866-219-0165 or consult with a Missouri attorney about your specific case.
Impact on Those Currently in the System
Amendment 3 did not just address past convictions. It identified 565 individuals on probation or parole for cannabis offenses who were eligible for sentence review. For these individuals, expungement could mean:
- Early termination of probation or parole
- Removal of cannabis offenses from criminal records
- Restoration of civil rights affected by felony conviction
- Elimination of collateral consequences (housing, employment, education)
Timeline of Expungement Process
Amendment 3 Adopted
Voters approved automatic expungement as part of Amendment 3. Constitutional deadlines set for completion of review process.
Massive Case Review Begins
Courts and the DCR began identifying and reviewing 307,000 cannabis-related cases across Missouri. Digital records processed first; paper records queued for manual review.
Constitutional Deadlines Missed
The state missed both constitutional deadlines for completing the expungement process. The volume of cases and paper records overwhelmed available resources.
Supreme Court Narrows Scope
The Missouri Supreme Court limited automatic expungement to offenses involving 3 ounces or less, excluding many convictions that advocates argued should qualify. Dan Viets called it "judicial activism."
140,000+ Records Cleared
Despite the complications, over 140,000 records were expunged or dismissed — a 46% clearance rate from the 307,000 cases reviewed. The process continues for remaining eligible cases.
Why This Matters
A cannabis criminal record can affect every aspect of a person's life:
- Employment: Background checks flag cannabis convictions, limiting job opportunities
- Housing: Many landlords and housing programs screen for criminal records
- Education: Federal student aid eligibility was historically affected by drug convictions
- Professional licensing: Many professions require clean background checks
- Child custody: Drug convictions can be used against parents in custody proceedings
Expungement removes these barriers. Missouri's automatic process — despite its imperfections — has cleared more records through a single ballot measure than most states have cleared in total.
Resources
- DCR Expungement Information
- Missouri NORML — Dan Viets, ongoing advocacy
- 866-219-0165 — DCR information line
Missouri became the first state to adopt automatic cannabis expungement by popular vote through Amendment 3 in November 2022. As of 2025, 307,000 cases have been reviewed and over 140,000 records cleared — a 46% clearance rate.
Missouri Division of Cannabis Regulation
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