Brett Kebble's former security head Clint Nassif was called a "liar" and an "evasive, dishonest witness" under cross examination at the trial of convicted drug dealer Glenn Agliotti on Friday.

Nassif's testimony was the first to directly link Agliotti to the attempt on the life of former Allan Gray auditor Stephen Mildenhall and to the murder of Brett Kebble.

Questioning by Agliotti's attorney Advocate Laurence Hodes SC entered its second day with Nassif again running through the events which led to the Mildenhall shooting. The now London-based auditor was seen to be standing in the way of Kebble getting loans for his mining companies.

Hodes lashed Nassif by charging that his testimony to the court was "irreconcilable" with his statement.

"You're a liar... its irreconcilable," Hodes told him, after much prodding for an answer.

Nassif hit back, pounding the witness stand: "I'm not a liar...your accused [Agliotti] is a liar.

"I'm taking responsibility for what I have done."

Both men shouted and interrupted each other, with Nassif getting increasingly flustered as Hodes attempted to get him to admit that he was lying.

Judge Frans Kgomo intervened, telling Nassif not to "get emotional" and urging Hodes not to interrupt.

It emerged that Kebble's business partner John Stratton, during a meeting in Cape Town, gave Nassif a knife to "take care" of Mildenhall.

Hodes wanted to know why Nassif apportioned responsibility for Mildenhall's shooting to Agliotti in his testimony to the court, but not in the statement.

In the statement, Nassif said he negotiated with Stratton on the R1 million payment for the "job".

In his testimony he told the court he and Agliotti discussed the fee before hand and then gave the figure to Stratton.

Nassif testified of a "hitlist" of people who Kebble and Stratton wanted dealt with. He battled to recall the names with Hodes prompting him relentlessly.

The names included Mark Wellesley-Woods, Dr Mark Bristow, Jean Daniel Nortier and journalist Paul Kirk, according to Nassif's statement.

Nassif, a tall burly man, slouched in the witness stand, frequently taking sips of water and visibly looking shaken.

As Kgomo adjourned for tea, he advised the prosecution to assist their witness and tell him to remain calm and not interject when the defence asked a question.

He told Nassif that if he felt "angry" and "ready to burst" he should say so and Kgomo would give him time to calm down.

Hodes's grilling of Nassif is set to continue on Monday as the trial resumes for further cross examination.

Agliotti is facing two counts of conspiracy to commit murder, one count of attempted murder and a fourth charge of murder.

The first count is conspiracy to commit the murders of Bristow, Nortier, Wellesley-Woods and Mildenhall.

The second count relates to the attempted murder of Mildenhall.

The last two charges are related to conspiracy to murder Kebble and Kebble's murder.

Kebble was shot in his Mercedes in Melrose, north of Johannesburg in September 2005.