The Pistorius family has denied in the "strongest terms" the athlete took acting classes in preparation for his murder trial, following accusations that he was "coached" by a professional actor.
In an open letter, British-born columnist Jani Allan accused him of faking his courtroom tantrums and described the athlete, who is accused of murdering girlfriend Reeva Steenkamp on Valentine's Day last year, as a "faux hero".
"I have it from a reliable source that you are taking acting lessons for your days in court," Ms Allan wrote. "Your coach has an impossible task."
She continued: "Oscar, I look at you mewling and puking in the witness stand. You truly represent everything the West loathes about white South Africans who live extravagant lives."
Anneliese Burgess, a spokesperson for the Pistorius family, dismissed Ms Allan's letter as a "mockery of the enormous human tragedy involving the Steenkamp family and our client and his family".