Law enforcement authorities have requested a warrant to formally arrest impeached South Korean President Yoon Suk Yeol, who is spending his third day at a detention center after his lawyers failed in a last-minute attempt to secure his release.

The Constitutional Court, an arbiter in a polarized nation, is about to consider whether Yoon Suk Yeol’s impeachment for declaring martial law was justified.

Yoon, who was impeached and suspended from office in December, is the first sitting South Korean president to be arrested.