A South Korean court sentenced former President Yoon Suk Yeol to life in prison on Thursday, convicting him of masterminding the December 2024 insurrection that saw armed troops deployed to parliament in a six-hour martial law bid that tested the resilience of one of Asia’s most stable democracies.
The Seoul Central District Court delivered the verdict before a packed courtroom, with the 65-year-old former prosecutor standing ashen-faced in a dark navy suit without a tie as the sentence was read. Prosecutors had sought the death penalty.
Judge Jee Kui-youn, speaking for a three-judge panel, said Yoon “conspired with his then-defence minister, Kim Yong-hyun, to subvert the constitutional order by deploying troops to parliament, intending to paralyse its functions.”
“It is the court’s judgment that sending armed troops to parliament … and using equipment to try to make arrests all constitute acts of insurrection,” Jee said.
Because of the martial law declaration, the judge added, “an enormous social cost was incurred.”
The Verdict and the Co-Conspirators
Kim, the former defence minister, received a 30-year sentence. Former top police officials were also convicted. In total, eight defendants faced judgment.
Yoon’s defence team said it would discuss whether to appeal. One of his lawyers, Yoon Kab-keun, called the ruling deeply flawed, saying it “completely ignored the key legal principle of basing findings on evidence.”
A lawyer for Kim said the former defence minister would “of course appeal.” Prosecutors expressed some “regret” over the sentencing but declined to say whether they would appeal.
Under South Korean law, masterminding an insurrection carries a maximum sentence of death or life imprisonment. The country last handed down a death sentence in 2016 but has not executed anyone since 1997.
The Six Hours That Shook a Democracy
Yoon’s martial law declaration lasted only about six hours before it was met by massive street protests and voted down by parliament. But those hours sent shockwaves through Asia’s fourth-largest economy, a key U.S. security ally long considered a model of democratic resilience.
Troops deployed to the National Assembly. Equipment was readied for arrests. Lawmakers scrambled to enter the building to vote down the decree. Citizens blocked military vehicles with their bodies.
Outside the courthouse on Thursday, hundreds of Yoon supporters rallied, calling for his release. At Seoul Station, 65-year-old Ko Jeong-suk watched the verdict and said the punishment should have been harsher.
“I really think it should have been the death sentence so that this doesn’t become an example to repeat,” she said.
Historical Echoes
Yoon becomes the third former South Korean president convicted on insurrection charges. Chun Doo-hwan was sentenced to death in 1996 for his 1979 coup and the bloody Gwangju massacre, later pardoned. Roh Tae-woo, Chun’s successor and co-conspirator, received a lengthy sentence before also being pardoned.
Before delivering the verdict, Judge Jee reviewed the long history of treason and insurrection—from the Roman Empire and medieval era to the trial and execution of England’s Charles I for waging war against parliament.
The historical weight was not lost on those watching.
The Political Fallout
President Lee Jae Myung, a liberal who won a snap election in June after Yoon’s removal, commended the Korean people for thwarting the martial law bid.
“It was possible because it was the Republic of Korea,” Lee said on X, using the country’s official name. His post was attached to a newspaper report suggesting some academics had recommended a Nobel Peace Prize nomination for the Korean public, which faced down troops and police without violence.
Yoon, who has maintained that his actions were within presidential authority and aimed at sounding the alarm over opposition obstruction, is also appealing a separate five-year sentence for obstructing attempts by authorities to arrest him after his martial law declaration.
What Comes Next
Yoon will likely remain held at the Seoul Detention Centre while appeals proceed. Judicial guidelines suggest the entire process, including appeals, should conclude within two years, though trials often exceed that timeline.
For South Korea, a nation that transformed from military dictatorship to vibrant democracy in a single generation, the conviction of another former president for insurrection is both a source of shame and a testament to institutional strength.
The man who sent troops to parliament now faces life in prison. The democracy he tried to subdue is intact. And the people who blocked military vehicles with their bodies are being discussed for a Nobel Prize.
History, in South Korea, has a way of repeating itself—and then holding the repeaters accountable.
