"If she had any conscience, she would resign".
Qoma said Brown needed to take responsibility for bringing disgraced former Eskom CEO Brian Molefe and now suspended chief financial officer Anoj Singh to the power utility after questions had been asked about their conduct at Transnet.
"Minister Brown's "I was lied to", "I didn't know" strategy is a public admission of incompetence. He then explained that "Minister Brown reports to the Guptas".
Eskom board spokesperson Khulani Qoma testified in Parliament on Tuesday that Public Enterprises Minister Lynne Brown blocked the board's early attempt to suspend Koko.
Earlier this year, Ngubane had received a list of allegations of corruption against Koko, and called a quick board meeting to discuss the matter.
"Just before Dr Ngubane called Koko in to suspend him, he [Khoza] sneaked out to "make a call to a G-brother".
Qoma said Ngubane had later confirmed to him Khoza's narrative, and "that he indeed received a call from Minister Brown to not go ahead with the suspension".
A short while later‚ Brown phoned to stop the suspension‚ leading to the conclusion that the Gupta brother must have phoned Brown to inform her of the imminent suspension of Koko.
"Let me state, unequivocally, that I do not take instructions from anybody".
"He [Khoza] described the new board members, who were due to be announced on June 23, as "abantwana besikole", which loosely translated means "school kids". People across her office and her portfolio are her proverbial water and they have all failed to debunk the capture claims.
He said it was Khoza who first put it to him that the minister is "captured", but his observations had borne out the theory that she is entangled in the dealings between Eskom management and the family reported to have skimmed billions off the State's balance sheet.
Qoma was shocked when Brown approved Koko's appointment as interim CEO.
"The relationship between him [Koko] and the truth does not appear to be quite close", he told the inquiry.
Koko was eventually suspended this year and is facing a disciplinary hearing after it emerged that his stepdaughter was a director of a company that scored R1 billion worth of deals from Eskom. Koko has been a central figure in the state capture allegations heard at the Parliamentary inquiry.