Yoon’s arrest could mark the beginning of a prolonged period in custody, lasting months or longer, as he faces the possibility of imprisonment on potential rebellion charges linked to his imposition of martial law on Dec.

Law enforcement authorities on Friday requested a court warrant to formally arrest South Korea’s impeached president, Yoon Suk Yeol, who was in his third day at a detention center after his lawyers failed in a last-minute effort to secure his release.

Yoon’s detention comes after a stand-off between South Korean investigators and his presidential bodyguards, who blocked earlier efforts to detain him.