The National Directorate of Public Prosecutions urged Deputy President Jacob Zuma on Monday to present the Hefer Commission with evidence that Bulelani Ngcuka, head of the NDPP, was abusing his power. "If Mr Zuma has any evidence of abuse and of ulterior motive, he is challenged to present such evidence to the Commission of Enquiry established by the President for this purpose," said acting NDPP spokesperson Rudolf Mastenbroek.