Nokuthula Dominica Mngomezulu, 51, told the commission's human rights violation committee, sitting in Empangeni, that her father-in-law Jeamson Ngoloyi Mngomezulu had fled to Swaziland from Ingwavuma in KwaZulu-Natal, where he was the local MK commander.
In mid-1985 two white policemen and a black member of the Inkatha Freedom Party, driving a bottle-green Toyota Cressida, abducted him and two others from his Swaziland home, Mngomezulu said.
"We never saw him again," she said.
She implicated a Capt Schoon, from Ndumo police station near the Mozambican border, in her father-in-law's abduction.
Commissioner Richard Lyster told Mngomezulu South African security forces abducted many people from neighbouring countries, particularly Swaziland, in flagrant violation of international law.