SEOUL, SOUTH KOREA — In a significant legal development arising from the fallout of the late 2024 political crisis, a South Korean court on Tuesday, May 19, 2026, sentenced former Defense Minister Kim Yong-hyun to three years in prison. According to local media reports, the conviction stems from charges that Kim deceived the Presidential Security Service into issuing a highly secure communication device just one day before former President Yoon Suk Yeol’s controversial and short lived declaration of martial law.
The Seoul Central District Court announced the definitive criminal verdict after finding the former defense chief guilty of obstruction of official duties by deception. According to a report by Yonhap News Agency, the prosecution successfully demonstrated that Kim fraudulently obtained the secure mobile phone on December 2, 2024, deliberately masking his true intentions ahead of the sweeping executive decree that stunned the nation less than twenty-four hours later.
Judicial investigators established that after securing the specialized device, Kim transferred the phone directly to Noh Sang-won, a former military intelligence commander and civilian official who was actively embedded within an investigative task force examining allegations of widespread election fraud. The presiding judges noted in their summary that the secure phone was subsequently utilized to coordinate clandestine activities linked directly to the martial law enforcement structure that was rapidly established under President Yoon’s decree.
In addition to the primary deception charge, Kim was convicted of instigating the destruction of evidence. The court found that the former minister had explicitly ordered a subordinate aide to systematically dispose of sensitive operational documents and internal records relating to the martial law period immediately after the National Assembly voted to lift the executive decree on December 5, 2024.
While federal prosecutors had aggressively pushed for a five-year prison term given the severe national security implications of the breach, the panel of judges cited Kim’s lack of a prior criminal record as a sufficient mitigating factor to justify handing down the lower three-year sentence.
The high-profile case represents the very first formal indictment brought to a conclusion by the specialized independent counsel team, which was officially launched in June 2025 to investigate the complex web of state overreach and institutional manipulation surrounding the aborted martial law bid. Despite the three-year penalty, Kim's legal battles are far from over; the former defense minister is currently facing a separate, high-stakes appellate trial where he is appealing a previous 30-year prison sentence related to much broader allegations of treason and insurrection stemming from his central role in the martial law attempt.
