Group 1 - The core point of the article is the sentencing of Kim Keon-hee, the wife of former South Korean President Yoon Suk-yeol, to 1 year and 8 months in prison for her involvement in illegal activities related to receiving high-priced gifts from a religious group [1] - Kim Keon-hee is accused of manipulating the stock price of Deutsche Motors, a BMW dealer in South Korea, resulting in illegal profits of approximately 810 million KRW between October 2010 and December 2012 [1] - Additionally, she is alleged to have conspired with Yoon Suk-yeol to accept public opinion survey services worth about 270 million KRW from a political broker, Min Tae-kyun, on 58 occasions between June 2021 and March 2022 [1]

Core Viewpoint - The special investigation team in South Korea has filed a lawsuit against former President Yoon Suk-yeol and political broker Myung Tae-kyun for alleged violations of the Political Fund Act, related to a bribery case involving former First Lady Kim Keon-hee [1] Group 1: Allegations and Legal Actions - The special investigation team claims that Yoon Suk-yeol and Kim Keon-hee conspired to receive approximately 270 million Korean won (about 0.2 million USD) worth of public opinion survey services from Myung Tae-kyun between June 2021 and March 2022 [1] - The prosecution is seeking the forfeiture of criminal proceeds obtained by Yoon Suk-yeol through violations of the Political Fund Act [1] Group 2: Investigation Details - Yoon Suk-yeol appeared as a suspect for questioning by the "Kim Keon-hee Special Investigation Team" on December 20 [1] - The special investigation team suspects that Yoon Suk-yeol not only received free public opinion survey services but also used his influence to secure the nomination of former National Power Party member Kim Young-sun in the Changwon Iksan district congressional by-election as a quid pro quo [1]