14 April 1990
Nelson Mandela admits that members of the ANC had tortured dissident guerrillas, but says the officials involved have been punished and that any further torture has been banned The TRC's report on the ANC and their human rights violations.  
References

Beaver country Times,(1990),Mandela admites to tortures,from Google newspapers,15 April,[online],Available at www.news.google.com [Accessed:11 April 2014]