White CIO agents who cooperated with South Africa included Geoffrey Price, an agent responsible for Prime Minister Mugabe's personal security, who, along with a small cell of white agents, supplied information leading to South Africa's August 1981 assassination of Joe Nzingo Gqabi, an ANC representative in Zimbabwe. Another, Matt Calloway, formerly the CIO's top agent in Hwenge District, was in 1983 connected by the Zimbabwean government to a South African operation that recruited disaffected Ndebeles and sent them back into Matabeleland as trained and armed guerrillas. The violence they sparked contributed to the start of the "Gukurahundi". A third was Kevin Woods, an agent until 1986, who served as the CIO's top administrative officer in Bulawayo throughout much of the "Gukurahundi". In 1988, Woods was arrested and charged with participating in a car bomb attack targeting an ANC representative in Bulawayo. At his trial, in a confession given freely because, he said, he feared interrogation methods which he was very familiar from his time at the CIO, Woods admitted to being a double agent for South Africa. Woods' confession, in a high-profile case that reached Zimbabwe's Supreme Court, brought new attention to the wide scope of South Africa's infiltration of Zimbabwe's intelligence apparatus, especially in relation to the "Gukurahundi". The Woods exposé was embarrassing for Mnangagwa, and according to one source, caused Mugabe to remove him from the position of Minister of State Security.