NextFin News - In a landmark ruling that has sent shockwaves through the global political landscape, the Seoul Central District Court on Wednesday, January 21, 2026, sentenced former South Korean Prime Minister Han Duck-soo to 23 years in prison. The court found Han guilty of playing a pivotal role in the failed martial law declaration of December 3, 2024, an event the judiciary has now officially branded as an "insurrection" and a "palace coup." The sentencing follows a high-stakes trial that began after the impeachment and subsequent removal of former President Yoon Suk-yeol in early 2025.
The court, presided over by Chief Judge Lee Jin-gwan, determined that Han neglected his constitutional duties by facilitating the declaration of martial law, which saw military forces and police occupy the National Assembly and the National Election Commission. According to Chosunbiz, the court imposed a sentence significantly harsher than the 15-year term initially sought by the special counsel, citing the need to "block insurrectionary acts in advance" and protect the democratic order of an internationally recognized advanced nation. Han was immediately taken into custody following the verdict, with the court citing concerns over the potential destruction of evidence.
The judicial characterization of the December 2024 events as a "palace coup" or "insurrection from above" represents a critical shift in South Korean legal precedent. Unlike past military mutinies, such as the 1979 coup led by Chun Doo-hwan, the court noted that this attempt was orchestrated by a democratically elected leadership against the very institutions it was sworn to protect. Judge Lee emphasized that when a power holder violates the Constitution, it shakes the foundations of the rule of law more violently than an insurrection from below. This distinction was a primary driver for the 23-year sentence, as the court sought to reflect South Korea's modern status as a mature democracy where such actions are deemed inexcusable.
The evidence presented during the trial painted a damning picture of Han’s involvement. The court found him guilty of creating the appearance of legitimate Cabinet deliberation for the martial law proclamation, attempting to coerce signatures from Cabinet members post-facto, and discussing the blockade of key institutions and media outlets with other high-ranking officials. Furthermore, Han was convicted of perjury for his testimony during the Constitutional Court's impeachment trial of Yoon, where he claimed he did not recognize the martial law proclamation at the time. According to Yonhap News Agency, the court ruled that Han chose to participate in the insurrection under the belief that it might succeed, showing no sincere reflection on the damage caused to the state.
This verdict carries profound implications for the ongoing legal proceedings against former President Yoon, who is currently facing eight separate cases related to the martial law declaration. Just last week, on January 16, 2026, Yoon was sentenced to five years in prison for obstruction of justice in the first of these trials. However, the Han ruling sets a much more aggressive tone for the upcoming insurrection trial against Yoon, scheduled for February 19, where the former president could theoretically face the death penalty. The court’s willingness to exceed the prosecution's sentencing recommendations for Han suggests that the judiciary is prepared to exercise maximum severity in cases involving the subversion of constitutional order.
From a broader perspective, the sentencing of Han serves as a stress test for South Korea’s institutional resilience. The 2024 crisis initially triggered significant volatility in the won and South Korean equities, as investors feared a return to authoritarianism. However, the swift judicial response and the peaceful transition of power under the current administration have largely restored market confidence. The 23-year sentence is likely to be viewed by international observers, including U.S. President Trump, as a reaffirmation of South Korea’s commitment to democratic stability. As the country navigates the aftermath of its most significant political crisis in decades, the Han verdict establishes a clear legal boundary: the machinery of the state cannot be used to dismantle the democracy that created it.
Looking ahead, the focus will shift to the appellate process and the final verdict for Yoon. While Han is expected to appeal the 23-year term, the detailed and forceful nature of the district court’s ruling suggests a high bar for reversal. The case also highlights the evolving nature of political accountability in the digital age, where the destruction of electronic records and the falsification of official documents—charges for which Han was also convicted—are increasingly difficult to conceal. As South Korea continues its recovery, the legacy of the "December 3 Insurrection" will likely be defined not by the chaos of the night, but by the uncompromising judicial accountability that followed.
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