On 9 December 2016, the National Assembly impeached Park on charges related to influence peddling by her top aide, Choi Soon-sil. Then-Prime Minister Hwang Kyo-ahn assumed her powers and duties as Acting President as a result. The Constitutional Court upheld the impeachment by a unanimous 8–0 ruling on 10 March 2017, thereby removing Park from office, making her the first Korean president to be so removed. On 6 April 2018, South Korean courts sentenced her to 24 years in prison (later increased to 25 years) for corruption and abuse of power. Park is currently imprisoned at Seoul Detention Center. In 2018, two separate criminal cases resulted in an increase of seven years in her prison sentence. She was found guilty of illegally taking off-the-book funds from the National Intelligence Service and given a five-year prison sentence, and also found guilty of illegally interfering in the Saenuri Party primaries in the 2016 South Korean legislative election, for which she was sentenced to two more years in prison.