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On March 2, 2026, Missouri made significant changes to its criminal laws related to driving under the influence (DUI) offenses, implementing harsher penalties for those convicted of drunk driving.Under the new law, individuals caught driving with a blood alcohol content (BAC) of 0.08 or higher will face a mandatory minimum sentence of 30 days in jail for a first offense. This represents a substantial increase from the previous penalty of a fine and possible license suspension. Repeat offenders will face even stiffer consequences, with mandatory minimum sentences increasing to 90 days for a second offense and one year for a third offense.In addition to increased jail time, those convicted of DUI offenses will also be required to attend mandatory alcohol education programs and may be subject to electronic monitoring or ignition interlock device installation on their vehicles.The decision to implement these harsher penalties comes in response to a rising number of alcohol-related accidents and fatalities on Missouri roads. Lawmakers hope that by increasing the consequences for driving under the influence, they will deter individuals from engaging in this dangerous behavior and ultimately save lives.Critics of the new law argue that it may disproportionately impact low-income individuals and people of color, who may not have access to alternative forms of transportation or be able to afford the financial burden of increased fines and penalties.Despite the controversy, Missouri lawmakers are confident that these changes to the state's DUI laws will make roads safer for all residents. The new penalties went into effect immediately on March 2, 2026, and will apply to all DUI offenses committed on or after that date.