South Korea’s prosecution has formally indicted former President Moon Jae-in on bribery charges linked to the employment of his former son-in-law at a Thailand-based airline.

The investigation centers on whether the appointment of former lawmaker Lee Sang-jik to a senior government role was tied to the hiring and compensation of Moon’s relative at the airline, which Lee controlled from 2018 to 2020. Lee has also been indicted, facing charges of bribery and breach of trust.

Prosecutors allege that the salary received by Moon’s son-in-law, who held an executive director position at the company, constituted an illicit payment intended for Moon while he was in office.

Efforts to reach Moon, Lee, or their legal representatives for comment have so far been unsuccessful.