By Muhammad Mamman
In an unprecedented ruling that has sent shockwaves through East Asia, a Seoul court on Thursday sentenced former President Yoon Suk Yeol to life imprisonment after finding him guilty of leading an insurrection linked to his 2024 declaration of martial law. 
The Seoul Central District Court delivered the verdict as part of one of the most consequential trials in the nation’s modern democratic history, holding Yoon responsible for what judges deemed a deliberate attempt to undermine the constitutional order and seize political control through illegal use of military and police forces. 
Judge Jee Kui-youn said the actions of the 65-year-old former leader — who mobilised troops around the National Assembly in December 2024 — constituted insurrection, a crime punishable under South Korean law by life imprisonment or, in rare cases, the death penalty. Prosecutors had sought the country’s harshest punishment, calling the act a grave threat to democratic governance, though the court opted for life in prison instead. 
Yoon’s brief declaration of martial law in December 2024 triggered a political crisis that lasted only six hours before lawmakers overturned it, but the court said its effects reverberated deeply through civic life and constitutional norms. The verdict marks the first time a democratically elected South Korean leader has received such a severe sentence for political offences. 
The disgraced former president, removed from office and impeached in late 2024, has been detained since July 2025 while facing multiple criminal cases. Throughout the trial he denied the charges, asserting his actions were a legitimate response to political opposition — a claim the court rejected. 
Yoon’s conviction underscores mounting judicial scrutiny of political authority in South Korea and reflects a broader reckoning over the boundaries of executive power in the world’s 12th-largest economy. The former leader is expected to appeal the ruling, sending the case into a protracted legal battle that will test both public confidence and the resilience of South Korea’s democratic institutions. 
