# South Korea’s Ex-President Jailed for Life Over Martial Law Attempt
Former South Korean President Yoon Suk Yeol has been convicted of insurrection and sentenced to life in prison for his December 2024 declaration of martial law, marking a pivotal moment in the nation’s modern political history[1]. The Seoul Central District Court’s ruling on Thursday represents a dramatic conclusion to one of South Korea’s most significant political crises in recent decades, with Judge Jee Kui-youn finding the 65-year-old conservative leader guilty of rebellion for his attempt to seize unchecked power[1].
## The Events of December 3, 2024
On December 3, 2024, President Yoon made a shocking decision that would ultimately end his presidency and lead to his conviction. He declared martial law and deployed military forces to surround the National Assembly, an action that recalled South Korea’s authoritarian past[1]. This was the first martial law declaration in more than four decades, harking back to the country’s era of military-backed governments when emergency decrees allowed authorities to station soldiers, tanks, and armored vehicles throughout public spaces[1].
The martial law proclamation granted sweeping powers, including the suspension of political activities, control over media and publications, and the authority to arrest citizens without warrants[1]. Yoon’s stated objective was to overcome a legislature controlled by his liberal political opponents, but the measure proved short-lived. The decree lasted approximately six hours before being lifted after lawmakers managed to break through military blockade lines and unanimously voted to rescind the measure[1].
## The Court’s Findings
Judge Jee Kui-youn’s verdict was unambiguous about Yoon’s intentions. The court determined that the former president’s primary purpose was to send troops to the National Assembly, block the building, and arrest key political figures, including National Assembly speaker Woo Won-shik and leaders of both ruling and opposition parties[1]. According to the judge, these actions were designed to prevent lawmakers from gathering to deliberate or vote, effectively paralyzing the Assembly’s functions for an extended period[1].
The prosecution successfully argued that Yoon’s martial law decree exceeded his constitutional authority, even under the broadest interpretation of emergency powers[1]. The court found that Yoon was clearly attempting to disable the legislature and prevent lawmakers from lifting the measure through voting—actions that constituted rebellion under South Korean law[1].
## Yoon’s Defense and Appeal Plans
Yoon maintained a composed demeanor throughout the proceedings, gazing straight ahead as the judge delivered the life sentence in the same courtroom where former military rulers and presidents have previously been convicted of treason and corruption[1]. The former president’s legal defense team disputed the verdict, with one of his lawyers, Yoon Kap-keun, accusing the judge of issuing a “predetermined verdict” based solely on prosecutors’ arguments and claiming that the “rule of law” had collapsed[1].
In his own testimony, Yoon argued that the martial law decree was merely intended to raise public awareness about how liberals were allegedly paralyzing state affairs, and that he was prepared to respect lawmakers if they voted against the measure[1]. However, this explanation failed to convince the court. Yoon’s legal team indicated they would discuss the possibility of appealing the verdict with their client[1].
## Additional Convictions and Sentences
Yoon was not alone in facing justice for the martial law attempt. The court also convicted and sentenced five former military and police officials involved in enforcing the decree[1]. Most notably, ex-Defense Minister Kim Yong Hyun received a 30-year jail term for his central role in planning the measure, mobilizing the military, and instructing military counterintelligence officials to arrest 14 key politicians[1].
Prime Minister Han Duck-soo, another member of Yoon’s Cabinet, received a 23-year prison sentence for attempting to legitimize the decree by forcing it through a Cabinet Council meeting, falsifying records, and lying under oath[1]. Han has appealed his conviction[1].
## The Path to Conviction
Yoon’s downfall occurred in stages. He was suspended from office on December 14, 2024, following his impeachment by lawmakers, and was formally removed by the Constitutional Court in April 2025[1]. He has been under arrest since July 2025 while facing multiple criminal trials[1]. Prior to the insurrection conviction, Yoon had already been sentenced to five years in prison for resisting arrest, fabricating the martial law proclamation, and circumventing a legally mandated full Cabinet meeting before declaring the measure[1].
## Political and National Implications
The conviction carries profound implications for South Korea’s democracy. The conservative People Power Party, to which Yoon once belonged, acknowledged the gravity of the situation when floor leader Song Eon-seok issued a public apology, stating that the party feels a “deep sense of responsibility” for the disruption to the nation[1]. The office of current President Lee Jae Myung, who was targeted for arrest during the martial law attempt, did not immediately comment on the ruling[1].
This case represents a critical test of South Korea’s democratic institutions and the rule of law. By holding a former president accountable for attempting to seize unconstitutional power, the nation has demonstrated its commitment to preventing a return to authoritarian governance, despite the political turbulence such proceedings inevitably create.
Original source: BBC News – South Korea’s ex-president jailed for life over martial law attempt
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