Prosecutors Seek Death for Yoon Over Failed Martial-Law Coup

South Korean prosecutors have asked an appeals court to sentence former president Yoon Suk Yeol to death for leading the failed martial-law power grab that sent armed troops into the National Assembly. The demand places the country’s sharpest legal weapon inside a case already defined by the defense of democracy against executive force.

Special counsel Cho Eun-suk’s team renewed the request at the Seoul High Court on October 29. Yoon is appealing the life sentence imposed in February for insurrection; prosecutors appealed too, arguing that the lower court punished him too lightly for an attack on the constitutional order.

Former president Yoon Suk Yeol arrives at the Seoul Central District Court in October 2025. Photo: Korea Times file image.

“There is no reason to hesitate to hand down the death penalty,” a prosecutor told the court, according to Yonhap. The team said the usual fear of executing an innocent person did not apply because “there is no room” for a mistaken judgment in this case.

The prosecution’s account is severe. It says Yoon prepared the operation for at least eight months, used his office to mobilize soldiers and police, and sought to paralyze parliament while arresting political opponents. A team member called it “the highest level of treason that betrayed the people’s trust.”

Yoon declared martial law late on December 3, 2024, claiming he needed to eliminate “anti-state forces” and break opposition obstruction. The decree lasted roughly six hours. Lawmakers pushed through a military and police blockade, assembled inside the National Assembly and voted to overturn it. The Cabinet then lifted the order.

Citizens block military vehicles near the National Assembly after the martial-law declaration, December 4, 2024. Photo: MoneyToday.

That resistance prevented a presidential decree from hardening into prolonged military rule. It also exposed the stakes of Yoon’s command: troops with rifles confronted civilians and entered the legislature while elected representatives raced to exercise the constitutional check that remained available to them.

The lower court found that Yoon illegally deployed troops and police to seize the legislature, arrest opponents and establish unchecked rule for a “considerable time.” Parliament impeached him in December 2024, and the Constitutional Court formally removed him in April 2025.

Yoon’s lawyers say prosecutors are repeating an argument “devoid of evidence and legal logic.” They insist the decree was a warning about the opposition-controlled legislature, not an attempt to injure anyone or build an authoritarian regime. The courts have so far rejected that account.

The death-penalty demand, however, creates its own democratic contradiction. South Korea has not executed anyone since December 1997 and is classified as abolitionist in practice. A death sentence would therefore function primarily as the state’s harshest declaration of condemnation, not as an imminent execution order.

Accountability for an attempted seizure of power must be real. Presidents cannot be permitted to send soldiers against a legislature, lose, and retreat behind the prestige of former office. But democracy does not need to imitate authoritarian violence to prove that it survived. Life imprisonment can incapacitate a coup leader without restoring the machinery of state killing.

That distinction matters beyond Yoon. Capital punishment expands state power precisely when this case is supposed to demonstrate its limits. The same institutions trusted to punish a former president will later operate under less extraordinary circumstances, against defendants with fewer lawyers, fewer cameras and far less political protection.

The court plans additional hearings before fixing a sentencing date. Yoon is scheduled to deliver a final statement next week. Prosecutors also sought long prison terms for former defense and police officials accused of helping execute the martial-law plan.

The central verdict has already moved beyond one man. South Korea’s institutions stopped the decree, removed the president and convicted him. The appeal will now decide whether constitutional accountability ends with permanent imprisonment—or crosses into a punishment the country has refused to carry out for nearly three decades.