Prosecutors are painting a picture of rivalry, jealousy and a competitive relationship between murdered farmer Scott Guy and his alleged killer.
Ewen Macdonald is accused of shooting his brother-in-law dead on the Guy family's Feilding farm in July 2010.
The Crown claims Macdonald's motive for killing him was jealousy because of tensions over the property. He has pleaded not guilty.
A farm consultant said the men started off as good friends, but their relationship "soured" as Macdonald became more involved in running the farm.
"The odd negative comment, just the odd little thing saying something's not quite right. Just less of a positive attitude towards Scott," Simon Redmond told the court.
Redmond said that in the months after the killing, Macdonald made comments about Guy being "braver than most" when he died.
He said Macdonald had also told him that shotguns were not traceable.
But under cross examination, Redmond said nothing Macdonald ever said gave him cause to think he was linked to Guy's murder.
Farm worker BJ Worthington told the court Macdonald had agreed the killer was a coward and should face a death sentence.
'Hot and cold'
One witness who worked on the farm described it as "hot and cold".
"In the early days, one would get a tattoo and the other would get a tattoo or someone would get a new car and the other would get a new car," Andrew Short said.
Short told the court of one instance when he was looking Guy,
and was told by Macdonald he was probably "skiving off
Short said he heard similar remarks from both of them.
In cross examination, Short admitted there were ups and downs to any business relationship, and said nothing he encountered gave him any real cause for concern.
David Ireland, who did work experience on the farm and was there the day Guy died, also given evidence at the trial.
He said he was the first one at the milking shed and expected Guy to be there as he was on the early start.
When Macdonald came to work, him and Ireland started working without Guy, and even joked he was probably sleeping in, Ireland told the court.
When Ireland asked if he should go and wake Guy, Macdonald said he had had tried to text and call him with no response and not to worry about it, he said.
The second week of the trial began today with the focus now on the relationship between Guy and Macdonald.
Harriet Purgel, who kept her horse at the Guy's farm, said she visited every day and the gates to the Guy's property were always open.
The Crown said the gates were closed the morning of the shooting, forcing Guy to leave his car to open them.