Lobbyist Frank Dunlop has denied to the Mahon Tribunal that he used dead county councillors as soft targets for allegations of bribery.
However, he has admitted to the Mahon Tribunal that he was wrong to say he paid a £1,000 bribe to the late Jack Larkin of Fianna Fáil who was in hospital recovering from a triple by-pass at the time alleged.
Patricia Dillon SC for the inquiry asked if this undermined Mr Dunlop's whole credibility in relation to the Ballycullen module.
Ms Dillon said it was only because of hospital records the tribunal knew that Mr Larkin could not have been receiving a bribe near Dublin County Council offices between September and November 1992.
Mr Dunlop admitted that he was wrong about the timing but insisted he gave a bribe to Mr Larkin after the rezoning was passed even though he had been too ill to vote.
Mr Dunlop said his allegations against other deceased councillors have subsequently been borne out.
He has accused three deceased councillors of bribery in the Ballycullen module and claimed that six others also received improper payments.
Later Mr Dunlop told Chairman Judge Alan Mahon he could not account for discrepancies in his account of the money paid to him by landowner Chris Jones.
At first he said he got £7,500 from Mr Jones for Ballycullen but the tribunal has shown he got at least £35,000.
Mr Dunlop said he must have gone back and asked for additional payments on top of his agreed fee but says he has no recollection of how this took place.