An affidavit by the former surgeon general of the former South African Defence Force, Dr Niel Knobel, presented to the Truth and Reconciliation Commission (TRC) in June 1998, was handed over to the committee investigating the cardiologist's alleged unethical conduct on Tuesday.
However, Basson's lawyers argued the affidavit was irrelevant to the hearing. “Again the relevance is really escaping us because it doesn't deal with any issue raised in the charge sheet at all,” said Jaap Cilliers SC, for Basson.
The contents of the affidavit were not disclosed at Tuesday's hearing.
The council's professional conduct committee is holding a hearing into allegations of unethical conduct against Basson.
On Monday, Salie Joubert SC, for the HPCSA, informed the hearing that he would be using evidence presented during Basson's criminal case and at the TRC.
However, it was ruled that evidence which had been presented during Basson's criminal case could not be used. Evidence from the TRC was, however, admissible.
No comment
On numerous occasions Knobel refused to answer Joubert's questions, arguing that he could not comment on evidence that he did not have before him.
Joubert described Knobel as “disruptive” and promised to prove that his evidence before the committee was unreliable.
During cross-examination on Tuesday, Joubert asked Knobel about details of meetings he had with former president Nelson Mandela when he was still in office.
Knobel refused and said the meetings were confidential. "Mr Joubert is starting to question me on meetings I had with Mr [Nelson] Mandela, which I am not at liberty to discuss," he said.
However, Knobel confirmed that Mandela had rejected calls by the UK and the US to prevent Basson from travelling abroad.
Knobel testified that chemical weapons were used against Unita rebels during the war in Angola. "Based on our own reports, although I was not personally involved in some of those incidents. South African troops who were deployed with Unita were often called to come forward to come and give assistance to members of Unita that were exposed to some or other chemical substance," said Knobel.
"The evidence that we have from the reports given by generals and commanding officers of that operation, all of them reported that there were bombs released by fighters, a lot of smoke was coming down and it affected a lot of the troops," he said.
Charges
The charges against Basson arise from his involvement in the apartheid government's chemical and biological warfare programme in the 1980s and early 1990s.
He is accused of acting unethically by being involved in the large-scale production of Mandrax, cocaine and teargas, of weaponising teargas, and of supplying it to Unita leader Jonas Savimbi.
He is also accused of acting unethically by providing disorientating substances for cross-border kidnappings, and making cyanide capsules available for distribution to operatives for use in committing suicide.
In 2002, Basson was acquitted by the North Gauteng High Court of criminal charges arising from his conduct.
The HPCSA reviewed the judgment to establish if there were grounds to continue with an inquiry against him.
The state appealed the high court decision in the Supreme Court of Appeal, but the appeal was dismissed. The state then went to the Constitutional Court to appeal the decision. That was also dismissed in September 2005.
In 2006, the HPCSA started its own process of investigating Basson's conduct. A charge sheet was drawn up and the inquiry began in November 2007.
However, the inquiry was delayed when the HPCSA's main expert witness fell ill. The inquiry resumed again in September 2008.
Basson appealed the decision
During the November 2008 hearing, Basson's lawyers argued that the case brought against him was unlawful and biased.
Basson's legal team then went to the North Gauteng High Court to stop the inquiry. The matter was heard in the high court in 2010. The court dismissed Basson's application in May 2010.
The next month, Basson appealed the decision in the same court, but lost. The hearing then resumed officially in September 2011.
In January 2012, Basson brought another application before the HPCSA's professional conduct committee to dismiss the matter. However, this application was also dismissed. – Sapa