 De Kock, who had established a reputation for commitment during his tours in Rhodesia and Namibia, was promoted as the unit's commanding officer two years later.Under his leadership, C10—later known as C1—became a death squad which hunted down and killed opponents of the National Party and the apartheid system.De Kock first became prominent during his testimony in the Truth and Reconciliation Commission, during which he made multiple revelations relating to ANC deaths.