[6][7] Also during this period, Koko's generation division came under scrutiny for controversial coal procurement deals that were alleged to favour the politically connected Gupta family.
On 30 November 2016, the Minister of Public Enterprises, Lynne Brown, announced that she would appoint Koko to replace him as acting Eskom CEO with effect from 1 December.
[16] In March 2019, the Sunday Times broke the first in a series of stories alleging that a corrupt relationship existed between Koko and Swiss ABB, which was awarded a R2.2-billion contract for the construction of the Kusile Power Station.
[18] However, the National Prosecuting Authority (NPA) suffered extensive delays in preparing for trial and requested multiple postponements.
[20] Citing the accused's right to a speedy trial, the court ordered that the case could not be reinstated without the written authorisation of the National Director of Public Prosecutions, Shamila Batohi.
[22] In 2014, Eskom signed a controversial R5-billion contract to refurbish steam generators at Koeberg Nuclear Power Station, awarding the tender to French Areva.
[23] In particular, Westinghouse alleged in court papers that divisional executive Koko and acting Eskom CEO Collin Matjila had intervened in the procurement process in a manner that suggested they were "intent on having the award made in favour of Areva".
[25] The Zondo Commission recommended that Koko should face criminal prosecution for his role in the transactions that allowed Tegeta Exploration and Resources, a Gupta-owned firm, to acquire the Optimum coal mine using Eskom funds.