Tae Yong-ho, a former North Korean diplomat turned South Korean lawmaker, resigned from his seat on the ruling party’s senior advisory body on Wednesday, after a series of controversies put the high-level defector’s political career in question.

Tae announced the decision to voluntarily step down from the People Power Party’s five-member Supreme Council ahead of a meeting of the party’s ethics committee, which was set to discuss his case the same day.