St. Louis County implemented a no-refusal policy for driving while intoxicated (DWI) arrests in November 2025, a change that mandates chemical testing for individuals suspected of driving under the influence. The St. Louis County Prosecuting Attorney's Office, in partnership with Mothers Against Drunk Driving (MADD), announced that drivers arrested on suspicion of DWI can no longer refuse a breath test. Previously, drivers could decline testing after receiving Missouri's implied consent warning, which advises that refusal results in a one-year license suspension. Under the old policy, refusal often complicated prosecution by allowing defense arguments based on alternative explanations such as fatigue or unreliable field sobriety tests.
The new policy aims to close perceived loopholes by ensuring prosecutors have chemical evidence of blood-alcohol concentration. Missouri, known as the 'Show-Me State,' emphasizes demonstrable evidence, and prosecutors have stated that this policy ensures intoxication is supported by scientific proof. However, the change introduces potential double penalties: a driver may face a one-year suspension for refusing a breath test and an additional 90-day suspension if a subsequent blood test shows a blood-alcohol concentration above 0.08 percent. These administrative suspensions can be appealed by a DWI attorney.
According to Brendan Block, a St. Louis-area criminal defense attorney, the role of defense counsel becomes even more critical under the new policy. 'Once chemical testing becomes mandatory, the focus shifts to whether proper procedures and training were followed and whether the evidence holds up in court,' said Block. Defense attorneys can cross-examine arresting officers, review police reports, and evaluate whether blood draws and testing complied with legal and constitutional requirements.
Critics of the policy have raised concerns, including hospitals being overwhelmed or unable to perform timely blood draws, medical personnel refusing draws due to liability concerns, and delays caused by the need to obtain judicial warrants, particularly during overnight hours. DWI filings in St. Louis County have increased since the policy change. In 2024, prosecutors filed 498 DWI cases; in 2025, filings increased by nearly 40 percent.
Block identifies timing as the biggest challenge facing blood-draw cases. 'A driver's blood-alcohol concentration decreases as time passes,' said Block. 'I recently handled a case where it took two and a half hours to obtain a blood draw. The result was a 0.03 percent BAC, and the case was dismissed. If blood results are not obtained in a timely manner, it can ultimately hurt the prosecution in some DWI cases.'
Drivers facing DWI charges under Missouri's updated enforcement policies are encouraged to understand their rights and act quickly. For more information, visit the firm's website.
