Scott Guy's father says the full truth did not come out in the trial for the murder of his son.
"There are unanswered questions as to who did kill Scott. Everybody's got their ideas but we don't really know the truth," Bryan Guy told One News.
"Justice was seen to be served at the trial but we didn't necessarily get the full truth out of that, perhaps."
He said he had not spoken to Ewen Macdonald, his son-in-law who was acquitted of the murder, since his arrest more than a year ago.
Macdonald admitted to other charges laid against him, including arson and vandalism that had been targeted at Scott Guy and his wife, Kylee.