On December 14, lawmakers voted to remove Yun from office over the "rebellious" suspension of civilian rule that plunged South Korea into some of its worst political turmoil in years.
Yun was suspended while South Korea's Constitutional Court ruled and Prime Minister Han Duk-soo served as interim leader.
The court has 180 days to rule on Yun's future.
On 15 December, however, opposition leader Lee Jae-myung urged judges to "swiftly" remove Yun from office.
"This is the only way to minimize the national turmoil and alleviate people's suffering. In order to hold those responsible for this absurd situation accountable and prevent its recurrence, it is necessary to reveal the truth and demand accountability," he said.
The investigation into Yun's inner circle in connection with last week's declaration of martial law is also continuing.
Prosecutors said they are seeking an arrest warrant for the head of the army's Special Warfare Command, Kwak Jong-kyun, Yonhap news agency reported.
Kwak has been accused of sending special forces troops into the country's parliament during the failed attempt to impose martial law, which sparked a dramatic confrontation between soldiers and parliament officials.
On 14 December, police arrested Yeo In-hyun, head of the Ministry of Defence's counterintelligence command, on charges including sedition. | BGNES
