"All I can say is he's been working early shifts [on the Kennedy and Staufer Breakfast Show] and I think he was just overtired," Wishart said. "We had a frank exchange on the air that night. I did my best to try and rein things in, as you would expect in a broadcasting situation. I'm really sorry the listeners had to hear that. I've forgiven him. I have full confidence that he will never repeat that behaviour again. It was what it was. It's two weeks in for this new show and he will not do that again."
A MediaWorks spokeswoman confirmed the broadcast had been removed from the RadioLive website and an apology issued to listeners.
"Some of the content broadcast on RadioLive in the early hours of Saturday morning was in poor taste and some listeners would have found it offensive or uncomfortable," the spokeswoman said. "For this reason, the audio was removed from the website and an on-air apology was made to late night listeners the following day."
Staufer will continue in his role as breakfast presenter on The Sound. It is not clear whether he will continue in the late night talkback slot or face disciplinary action over Friday night's show. "Management will be reviewing the matter further," MediaWorks' spokeswoman said.
Staufer went to school with Russell Crowe and the pair have been collaborating on a biopic of acerbic stand-up comic Bill Hicks.
'I have known Mark for 30 years," Wishart said. "He is a good friend.He's known to be artistic and on the edge."
- Additional reporting Steve Deane