Former developer Tom Gilmartin has been accused at the Mahon Tribunal of inventing a devious tissue of lies against Taoiseach Bertie Ahern.
But Mr Gilmartin denied giving conflicting evidence and said the main thrust of his story remains the same about £80,000 allegedly paid to Mr Ahern by developer Owen O'Callaghan.
Bertie Ahern's counsel said Tom Gilmartin's story had changed and evolved as he went along about claims of money paid to his client.
Mr Gilmartin described in testimony how developer Owen O'Callaghan bragged about paying Mr Ahern £50,000 around 1989 and £30,000 around 1992.
Counsel Colm Ó hOisin pointed out that the £50,000 allegation was not recorded in tribunal interviews until 1999 and claimed Mr Gilmartin got the story from a journalist.
Mr Ó hOisin also pointed out that in his 2001 tribunal statement Mr Gilmartin said he was told of both payments at the same time around 1992.
But in sworn testimony to the tribunal Mr Gilmartin said he was told of the £50,000 payment around 1989 during a taxi ride with Mr O'Callaghan.
Mr Gilmartin said he cannot account for what was left out of tribunal interviews.
He said he had given more details in longer statements but insisted that the main thrust of this story remained the same from day one.
He added that he told the tribunal of the £50,000 allegation before it surfaced in the media.
Lawlor paid £5,000 at weekends, says Dunlop
Earlier former lobbyist Frank Dunlop testified that the late Liam Lawlor was in serious financial difficulties despite enjoying all the trappings of wealth.
Mr Dunlop told the Mahon Tribunal he was in the habit of giving the then TD up to £5,000 at weekends.
Frank Dunlop said Mr Lawlor lived in a period house and drove large cars.
However Mr Lawlor confessed to him that he was in serious financial difficulty between 1991 and 1994.
Mr Dunlop said he was involved in an unsuccessful attempt to get a loan for Mr Lawlor from AIB using his shareholding in Citywest as collateral.
Mr Dunlop said he also gave Mr Lawlor between £2,000 and £5,000 in cash on a Thursday or Friday.
Mr Dunlop was told that the tribunal has no explanation from Mr Lawlor's estate about a lodgement of £8,000 to the account of Ms Hazel Lawlor in September 1991.
Mr Dunlop said he could not explain what he did with £5,000 cash withdrawn from Irish Nationwide shortly before that date.
