Both Yoon and Kim have been arrested and are in jail, with Yoon already undergoing trial on charges that include insurrection following his ouster in April over a botched bid to impose martial law in December.

The couple are under separate investigations by special prosecutors appointed after Yoon’s removal from office and President Lee Jae Myung took office.

It is the first time that a former first lady has been indicted in South Korea.

The charges against Kim, which are punishable by years in prison if she is found guilty, range from stock fraud to bribery that have implicated business owners, religious figures and a political power broker.

The former first lady has been the subject of numerous high-profile scandals, some dating back more than 15 years, which overshadowed Yoon’s turbulent presidency and inflicted political damage on him and his conservative party.

Kim’s lawyers have denied the allegations against her and said news reports about some of the gifts she allegedly received were groundless speculation.

Special prosecutors investigating the country’s martial law crisis also indicted on Friday former Prime Minister Han Duck-soo who was appointed by Yoon on charges of abetting insurrection and committing perjury, a prosecution spokesperson said.