South Korea should provide a “concrete explanation” about the 2020 killing of a government worker in North Korean waters to the victim’s family, the U.N. special rapporteur on North Korean human rights said Wednesday

Tomás Ojea Quintana’s remarks in Seoul came amid a snowballing controversy in South Korea over the former Moon Jae-in administration’s response to the shooting of Lee Dae-jun by DPRK soldiers, in particular the ROK military’s initial claim that he had been trying to defect.

Last week, South Korea’s defense ministry and coast guard announced that they had found no evidencethat the official was a defector.