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South Korea's Supreme Court ruled on October 25 that a drunk driving test conducted without giving the driver water to rinse their mouth cannot be used as evidence of guilt. The court overturned a lower court's guilty verdict against a man in his 40s, identified as Kim, who was prosecuted for drunk driving after being stopped in Sejong City in December 2023, and sent the case back to the Daejeon District Court. The ruling, reported by Dong-a Ilbo and Hankyung, states that such test results are, in principle, inadmissible as evidence of guilt.