Seoul: South Korean investigators began questioning President Yoon Suk-yeol on Wednesday after arresting him over accusations of insurrection following his briefly imposed martial law.

The arrest ended a standoff between investigators and Yoon’s presidential security team, which had prevented his detention earlier this month.

The Corruption Investigation Office announced it had “executed an arrest warrant for President Yoon Suk-yeol today at 10:33 am,” after which he was seen stepping out of the car wearing a white shirt and suit as he slipped through the CIO’s back entrance for high-ranking officials.

“I decided to answer to the CIO’s investigations in order to prevent unsavory bloodshed,” Yoon said in a pre-recorded video statement released by his lawyers following the arrest.

“That does not mean I recognize the CIO’s investigation as legitimate.”

The CIO is leading a joint probe — together with military investigators and police — to probe allegations against Yoon.

He is charged with insurrection and will be held at the Seoul Detention Center. Authorities now have 48 hours to question the president and seek a warrant to detain him for up to 20 days.

The probe coincides with Yoon’s impeachment trial at the Constitutional Court. The trial began on Tuesday, but hearings were adjourned minutes after it started due to Yoon’s absence.

The trial follows the National Assembly’s vote on Dec. 14 to impeach Yoon over the imposition of martial law on Dec. 3 — a move that lawmakers swiftly overturned hours after it was announced.

Yoon is the first sitting president in South Korean history to be arrested.

The CIO’s legitimacy in investigating Yoon has come under scrutiny as the president and his lawyers argue that it lacks the legal authority to investigate insurrection charges.

“The CIO does not have the right to investigate insurrection charges ... We strongly urge them to follow due legal processes,” Yoon’s lawyer and friend of 40 years, Seok Dong-hyun, said in a press conference after the president was taken into custody.

Prof. Hong Young-ki from the Korea University School of Law told Arab News it was a matter of interpreting the law, “but the court has already confirmed the legitimacy” by approving the arrest warrant.

“The court already recognized the CIO’s jurisdiction when it issued the arrest warrant. Then who can go against the court and say that the CIO is illegitimate? How can a third party do it?” he said.

“The president wants to say that, but how can someone who was merely a prosecutor say his interpretation is more correct than that of the court? I don’t really think his argument has that much persuasive power.”

Claiming that the CIO’s investigation was illegitimate, Yoon tried to evade arrest also during the eventually successful second attempt, which started at 4:10 a.m., with 3,000 officers surrounding his hillside house.

Buses and barbed wire were set up on the road leading to Yoon’s residence to prevent entry, while lawmakers from the president’s ruling People’s Power Party gathered at the site, tried to block the authorities, and shouted that “South Korea’s rule of law has collapsed” and that the “constitution has been destroyed.”

The opposition Democratic Party welcomed the arrest.

“A bit late, but it shows that South Korea’s governmental authority and justice is still alive,” floor leader Park Chan-dae said in a briefing.

“(Yoon’s arrest) is the first step in restoring liberal democracy and realizing the rule of law.”