Impeached South Korean President Yoon Suk Yeol remains detained after his lawyers failed to secure his release. Yoon was questioned over rebellion allegations linked to his martial law declaration. Despite his lawyers' claims of an illegal investigation, the Seoul Central District Court upheld his detention. Yoon avoided prior questioning, prompting a large-scale operation for his arrest. The anti-corruption agency has 48 hours to seek a formal arrest order. Yoon's martial law declaration led to his impeachment, sparking a major political crisis.