A special counsel of the Republic of Korea (ROK) on Tuesday sought a 23-year prison sentence in the appeals court for former Prime Minister Han Duck-soo for aiding the insurrection of former President Yoon Suk-yeol.

The team of Cho Eun-suk, an independent counsel who led investigations into Yoon's insurrection and other charges, demanded the 23-year prison term in appeal after requesting a 15-year imprisonment in the first instance.

The Seoul Central District Court sentenced Han to 23 years in prison in January.

Han was charged with engaging in critical duties of the insurrection relevant to Yoon's martial law declaration. Yoon was sentenced to life in prison in February on the insurrection charges.

The emergency martial law was declared by Yoon on the night of December 3, 2024, but it was revoked hours later by the National Assembly.