Sampson also said that other warders, specifically Christo Brand, had told him in interviews that they suspected Gregory of spying for the government. Mandela later invited Gregory to his inauguration as President, apparently having forgiven him as he had forgiven both the former President, Pieter Botha, and the prosecutor, Percy Yutar, who had argued for his execution in the Rivonia Trial. References See also Nelson Mandela Long Walk to Freedom "I Am Prepared to Die" speech FW de Klerk James Gregory Goodbye Bafana 1999 non-fiction books Apartheid in South Africa Biographies of Nelson Mandela South African non-fiction books HarperCollins books