Yoon – South Korea Supreme Court Upholds Seven-Year Sentence for Former President
Yoon – South Korea’s Supreme Court has upheld a seven-year prison term for former President Yoon Suk Yeol, marking the first final ruling from the series of criminal cases linked to his short-lived declaration of martial law in December 2024.
Court Confirms Convictions in Martial Law Case
The top court on Thursday backed an earlier Seoul High Court decision that found Yoon guilty of violating Cabinet members’ right to discuss the emergency measure before it was announced. Judges also upheld findings that he altered the official martial law proclamation, later destroyed the document, and used presidential security personnel to obstruct investigators attempting to arrest him after his impeachment.
The decision is final, and Yoon, who remains in custody, was not present when the ruling was delivered. His legal team said it regretted the outcome, arguing that the Supreme Court had concluded an important case without what it described as adequate examination.
Martial Law Order Ended Within Hours
Yoon declared martial law during a late-night televised address on December 3, 2024. The measure was overturned within hours after lawmakers entered the National Assembly despite a security blockade involving armed soldiers and police officers.
Members of parliament voted to revoke the order, leaving the Cabinet with no option but to withdraw the declaration. The episode quickly triggered one of the most serious political confrontations in South Korea in recent years.
Cabinet Consultation at Centre of Verdict
The Supreme Court ruling focused heavily on whether Yoon followed the required constitutional and administrative procedures before imposing martial law. Although he summoned 11 Cabinet members to his office shortly before the announcement, testimony suggested that the meeting did not involve meaningful discussion.
Former Prime Minister Han Duck-soo and other participants told the court that Yoon informed them of his decision rather than seeking their views. The Seoul High Court had also concluded that nine other Cabinet members were denied the opportunity to participate because they were either not invited or were informed too late.
The findings were consistent with the Constitutional Court’s decision to remove Yoon from office in April 2025. That court ruled that the martial law declaration had no lawful basis and was issued without following the necessary procedures.
Other Criminal Appeals Remain Pending
The seven-year sentence is only one part of Yoon’s wider legal battle. He is also challenging a life sentence imposed in a separate rebellion case, which is considered the most serious charge against him.
In another case, Yoon has appealed a 30-year prison sentence over allegations that he ordered drone operations in 2024 to increase tensions with North Korea and create conditions that could later be used to justify martial law inside South Korea.
His lawyers have rejected that interpretation, saying the drone activity was a response to North Korea’s repeated launch of balloons carrying rubbish into South Korean territory.
Political Fallout Continued After Impeachment
The martial law declaration lasted only a few hours, but its consequences extended well beyond that night. The crisis disrupted government operations, affected diplomatic engagement at the highest level and unsettled financial markets.
Political uncertainty eased after Lee Jae Myung, Yoon’s liberal opponent, won the early presidential election held in June 2025. However, the legal proceedings against the former president continue to remain a major issue in South Korean public life.