A man who wanted to post a reward for any information that would help find and convict the killer of Feilding farmer Scott Guy withdrew the offer after police asked him to.
Scott Guy, 31, was found shot dead in the driveway of his farm on 8 July.
Kevin McNeil, the son of Lois Dear, a schoolteacher murdered in her classroom in Tokoroa in 2006, planned to offer a reward for information that could help find whoever killed Mr Guy.
But Mr McNeil says the police have refused his offer, saying they don't want a culture to emerge whereby people come forward with evidence only if they expect money in return.
He withdrew his offer after the police assured him that that was what the family wanted but says it's a shame because New Zealanders, he thinks, would have gotten behind it.
Last week, police said any rewards needed to be considered carefully to ensure the investigation was not hampered by misleading information.
Mr Guy's father, Bryan Guy, says he completely supports the police's decision on any reward.
He says he's had three other people approach him offering to put up rewards.
Mr Guy hopes goodwill and the promise of a clear conscience will be enough to motivate anyone with information to come forward.
Ms Dear's killer was sentenced to a minimum of 18 years in prison in 2007.