Patricia de Lille is on the warpath.
The fiery politician who faced the fury of the African National Congress when she first identified senior ANC leaders as benefiting from the arms deal is turning her attention to the country's chief prosecutor - who at one stage threatened to prosecute her.
She wants national director of public prosecutions Bulelani Ngcuka's "full reasons" for not prosecuting Deputy President Jacob Zuma.
Her lawyers sent a letter to Ngcuka on Monday and stated that their client (De Lille) was subjected to severe pressure from parliament when she first made revelations about the arms deal, and that Ngcuka had threatened her with prosecution.
De Lille's letter coincided with the latest revelations on Monday against Zuma, contained in the charge sheet against businessman Schabir Shaik, Zuma's financial adviser.
Most opposition parties called on Zuma earlier in the day to resign if he cannot refute the allegations.
De Lille first threatened to take legal action after Ngcuka's statement on Saturday that there is prima facie evidence against Zuma, but that he will nevertheless not be prosecuted as the case was not "winnable".
Late on Monday her lawyers told Ngcuka to confirm these statements by September 1 and provide De Lille with full reasons why Zuma will not be charged.
On September 19, 1999 De Lille first made the startling revelation that members of government were allegedly involved in corruption in the arms deal.
After an initial legal perusal of documents provided by her and parliament's standing committee on public accounts, President Thabo Mbeki announced in January 2000 that there was no prima facie evidence against anyone in government pertaining to the arms deal.
Another person who fell foul of the allegations around the arms deal, former Scopa chairperson Gavin Woods of the Inkatha Freedom Party, on Monday welcomed the fact that the state "acknowledged the significance of the letter" written to him in person by Zuma on January 19, 2001.
In the charge sheet against Shaik, the letter is cited as possible evidence that Zuma was allegedly honouring an bribe solicited from Thomson-Thales, a beneficiary of the arms deal.
Democratic Alliance chief whip Douglas Gibson, said on Monday that the "cloud which hung over Zuma over the weekend has turned into a full blown tornado. Unless he can decisively refute these allegations his deputy presidency has suffered a mortal blow. He will have to go."
United Democratic Movement leader Bantu Holomisa also asked for Zuma's immediate resignation. African Christian Democratic Party leader Kenneth Meshoe said: "Zuma must either prove his innocence or step down in order to restore confidence in the integrity of the leadership of South Africa."
The New National Party's Carol Johnson, however, said it may be premature for him to step down. "Let's assume he is innocent until proven guilty and let a court find him guilty."