The case brought against Jun’s December 3 decision to declare martial law is being investigated by the High-ranking Officials’ Corruption Investigation Office (CIO).
The CIO on Monday requested a warrant to arrest and search the ousted president’s office after Yun ignored three subpoenas and failed to appear for questioning.
Yun is the first sitting president to face detention.
Once he is taken into custody, the CIO will have 48 hours to decide whether to seek a warrant for a longer detention or to release Jun.
However, the Presidential Security Service, citing security concerns, has denied investigators access to the president’s office and his official residence to search there.
According to reports, Jun declared martial law on December 3, but canceled it the next morning because all the members of the National Assembly present demanded it.
Yun justified the declaration of martial law with the need to protect the country from “communist forces”. However, his actions were condemned by both the opposition and the position.
It was the first time a president has declared martial law since South Korea’s transition to democracy in the late 1980s.
In response to the declaration of martial law, the opposition parties submitted a proposal for the impeachment of the president, which was supported by 204 out of 300 parliament members on December 14.
Now, within 180 days, the decision of the parliament must be evaluated by the Constitutional Court.
Two weeks later, the parliament also voted to impeach acting president Han Duxu.
Now, the duties of president and prime minister are entrusted to his deputy, Chwe Sanmok.