Matthews attended Madibane High School in Diepkloof, Soweto, where he became politically active. Along with other Soweto students, he opposed apartheid policies affecting the daily lives of black South Africans. He joined the Soweto Students Representative Council (SSRC), led by Tsietsi Mashinini, who later died in exile under mysterious circumstances. Initially formed as an Action Committee of the South African Students Movement, the SSRC organised the 16 June 1976 Soweto student demonstrations, which met with brutal police violence.
During the uprisings, Matthews and fellow Madibane students mobilised against making Afrikaans a compulsory medium of instruction under the Bantu Education Act of 1953. On 13 June 1976, students met at Orlando Donaldson Community Hall to plan a peaceful protest for 16 June. In the following days, hundreds of students were shot by the South African Police (SAP).
After the demonstrations, the apartheid police hunted SSRC leaders, forcing Matthews into hiding. In late 1976, he joined uMkhonto we Sizwe (MK), the ANC’s armed wing, and left for Botswana in October for military training. On 21 January 1977, he was apprehended near Zeerust while re-entering South Africa and detained under section 6(1) of the Terrorism Act, shortly after Minister of Police Jimmy Kruger announced amnesty for returning youths.
After several unaccounted days, Matthews was booked into John Vorster Square Police Station on 27 January 1977. He was never charged with any criminal offence. Given the modus operandi of the Security Branch, it is likely that Matthews was subjected to torture prior to his detention at John Vorster Square.
Matthews was detained, interrogated, and most likely tortured for 19 days before he fell to his death from the infamous 10th floor of John Vorster Square on 15 February 1977. According to statements made by Security Branch members at the subsequent inquest, on 15 February 1977 at approximately 08h40, Matthews arrived at the interrogation room on the 10th floor for questioning. There were three officers in the room at the time, namely Warrant Officers Leana Viljoen and Petrus Daniel Jordaan and Sergeant Jacobus Johannes Cilliers. Shortly after the commencement of the interrogation, the questioning was interrupted. Whilst the interrogation was adjourned, the police members alleged that Matthews tried to escape by climbing out a window, began walking along a ledge on the outer wall, when he lost his balance and fell.
When our family retrieved Matthews’ body from the government mortuary, Matthews’ father discovered a disturbing message in his trouser lining, warning: “Brother Lasch, tell mother and my other brothers that the police will push me from the tenth floor. I bid you farewell.”