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South Korea's Supreme Court has ruled that if police do not provide water for a suspect to rinse their mouth before a breathalyzer test, the resulting evidence cannot be used in court. The decision, reported by Hankyung on October 25, means such test results are inadmissible as proof of guilt in DUI cases. Korean legal commentators and netizens are discussing the ruling's implications for police procedures and DUI enforcement, with some welcoming it as a protection of suspects' rights and others concerned it may weaken prosecution of drunk driving cases.