South Korean police have launched an investigation into President Yoon Seok-yol over his decision to impose martial law amid a political crisis, AFP reported, citing a law enforcement official.

According to the source, the investigation was launched after receiving numerous requests from opposition politicians and public organizations who questioned the legality of this step.

"The case [against the head of state] is ongoing," — a law enforcement representative confirmed, declining to comment further.

Yun Seok-yol's declaration of martial law, which he said was necessary to combat "pro-North Korean forces," has caused widespread public outcry. The decision has sparked mass protests in Seoul and criticism from the opposition and international organizations.

South Korea's parliament had previously voted to lift martial law, which many saw as a serious political blow to the president. Despite this, Yun Seok-yeol continues to defend his position, claiming that his actions were aimed solely at ensuring national security and stability.

Opposition forces, including the Democratic Party, have called the president's actions an attempt to usurp power. They are also demanding a full investigation into all the circumstances surrounding the decision to impose martial law and the alleged violations of the constitution.

The investigation launched by the police could have a serious impact on the future political career of Yun Seok-yeol. If his actions are proven to be illegal, the president could face not only the loss of his position through impeachment, but also criminal liability.

In the past 30 years, four former presidents have been convicted and sentenced to prison terms in South Korea:

– Chun Doo-hwan (1980–1988): convicted of treason and corruption in 1996, sentenced to death, later commuted to life imprisonment. Pardoned in 1997.

– No Tae-woo (1988–1993): convicted of corruption and participation in a coup d'état in 1996 and sentenced to 17 years in prison. Pardoned in 1997.

– Lee Myung-bak (2008–2013): Convicted of bribery and embezzlement in 2018, sentenced to 15 years in prison and fined 13 billion won. Pardoned in 2022.

– Park Geun-hye (2013–2017): Convicted of corruption and abuse of power in 2018, sentenced to 24 years in prison, later increased to 25 years. Pardoned in 2021.

The cases reflect South Korea's tough anti-corruption policies, where even top officials are held accountable for crimes.