Missouri Criminal Defense: the first official sources worth checking, warrant cleanup, and without burying practical answers under doctrine

The trajectory of Missouri criminal law since 2014 cannot be disentangled from the Ferguson uprising. In August 2014, the shooting of Michael Brown in Ferguson — a municipality of approximately 21,000 within St. Louis County — sparked national protests and prompted a Department of Justice investigation that resulted in a 2015 report documenting unconstitutional policing patterns in Ferguson: excessive stops and searches targeting Black residents, traffic violations used to generate fine revenue through St. Louis County's web of over 80 municipal courts, and a pattern of municipal court warrants issued for minor violations trapping residents in cycles of debt and incarceration. The DOJ Ferguson Report accelerated Missouri's municipal court reform effort — the Missouri Supreme Court's "Mack's Creek Law" revisions capped the percentage of municipal operating revenue derived from traffic fines (prior law allowed no cap), and the Missouri legislature reformed municipal court procedures to reduce the warrant mill that had characterized North St. Louis County's courts. This reform context shapes Missouri criminal defense practice in the St. Louis region to this day.

Missouri's criminal code (RSMo Title XXXVIII, Chapters 556-600) was modernized through the Missouri Criminal Code Revision effective January 1, 2017 — a comprehensive overhaul that reorganized felony classifications, updated property crime thresholds, and refined various offense elements. Missouri's felony classes post-2017: Class A felony (10-30 years or life); Class B felony (5-15 years); Class C felony (3-10 years); Class D felony (up to 7 years); Class E felony (up to 4 years). Missouri misdemeanor classes: Class A misdemeanor (up to 1 year/$2,000 fine); Class B misdemeanor (up to 6 months/$1,000 fine); Class C misdemeanor (up to 15 days/$750 fine); Class D misdemeanor (no jail, up to $500 fine). Missouri retains the death penalty with an active death row, and Missouri has conducted more executions than any state except Texas since the Supreme Court's 1976 Gregg v. Georgia reinstatement of capital punishment.

Missouri's 2022 Marijuana Legalization: Amendment 3

Missouri voters approved Amendment 3 to the Missouri Constitution in November 2022 by approximately 53% to 47%, legalizing adult recreational marijuana use. Missouri's recreational framework: Adults 21+ may possess up to 3 ounces of marijuana; cultivate up to 6 personal plants (mature and immature combined); purchase from licensed dispensaries (Missouri's prior medical marijuana dispensary network transitioned to dual medical/recreational operations beginning February 2023). Amendment 3 also included an automatic expungement provision for prior marijuana offenses: individuals convicted of non-violent marijuana offenses of types now legal under Amendment 3 were entitled to petition for expungement of those convictions from their records — a significant retroactive relief provision affecting thousands of Missouri residents. Missouri's marijuana expungement process required petitions to the convicting court; the courts' processing timelines have varied significantly by jurisdiction. The federal-state conflict remains: marijuana remains a Schedule I controlled substance under federal law regardless of Missouri's constitutional amendment, creating issues for federal employees, federal contractors, public housing residents, and FHSA/federal mortgage loan applicants who cannot use marijuana without federal consequences.