David Bain has delivered his first formal public speech as part of a conference on legal justice held in Australia on Saturday.
Mr Bain told the international justice conference of his anger and resentment towards the police, and says it would be nice if they admitted their mistakes in his case.
Mr Bain spent 13 years in prison before being acquitted of the murders of his parents, two sisters and brother in the family's Dunedin home in 1994.
In a one-hour speech in Perth, Mr Bain told the conference his memory of finding the bodies of his family was clouded by shock.
He later told reporters the New Zealand justice system had failed him and he still holds a grudge against the police.
"These men and women, they performed their duties at the time and you've got to move past that ... it would be nice if they admitted their mistakes though," he said.
The conference in Perth is being billed as a world-first gathering of forensic experts, lawyers and justice advocates.
Mr Bain spoke alongside American boxer Rubin 'Hurricane' Carter and Australian Lindy Chamberlain-Creighton who was pardoned after arguing that a dingo killed her daughter Azaria in 1980.
He told his story alongside his long-time supporter Joe Karam.
