However, CIO deputy director Lee Jae-seung told reporters earlier on Tuesday that the likelihood the court would not grant an extension was “very low”.
Yoon is being investigated on charges of insurrection and, if formally arrested and convicted, faces prison or, at worst, the death penalty.
His lawyers repeatedly said the initial warrant was “unlawful”, pledging to take further legal action against it.
Yoon’s lawyers have argued the CIO lacks the authority to investigate, because insurrection is not included in the list of offences it can probe.
But the likelihood for the reissued warrant to be accepted was “quite high”, said Yun Bok-nam, president of Lawyers for a Democratic Society, who is not involved in the investigation.
But it may take longer than expected for the warrant to be issued again.
“In the previous instance, it took quite a long time — almost a day and a half,” Yun told AFP.
Protest lull
The CIO is a relatively new force — nearly four years old — with fewer than 100 staff who are yet to prosecute a single case.
“Naturally, they have no prior experience with arrests, let alone something as significant as arresting the president,” Yun said.
“The cooperation of the police is essential”, he added, through the Joint Investigation Headquarters umbrella under which both forces are currently working together.
