A man accused of killing Feilding farmer Scott Guy denied involvement in several incidents which happened on the farm in the lead-up to the killing.
Ewen Macdonald is before the High Court at Wellington charged with murdering his 31 year-old brother-in-law, Mr Guy, in July 2010.
Earlier in the trial, the jury heard that Ewen Macdonald had admitted his involvement in the arson of a house on the Guy farm and a graffiti attack on the walls of Scott and Kylee Guy's new home.
But in a police interview played to the jury on Monday, Mr Macdonald denied having anything to do with the arson.
He said he thought the removal of the old house was going to help Scott and Kylee build their dream home and torching the house had no benefit to him at all.
Earlier a detective gave evidence about discussing the graffiti with Mr Macdonald, who said he had no idea who had done it.
Jurors were also told that following the death of Scott Guy Mr Macdonald received a $10,000 pay rise.
Scott Guy's father Bryan Guy told the court that after his son died Mr Macdonald's pay increased to reflect the greater responsibility he had in running the farm.
Farm consultant David Beca had earlier told the court that when the family was discussing the farm's future Ewen and Anna Macdonald had raised misgivings about the hours he worked, which they said were unsustainable.
Mr Beca said the dairying side of the operation, which Mr Macdonald ran, would require a greater time commitment than the part of the farm run by Scott Guy.