The chairman of the Parole Board, Judge Sir David Carruthers, said while he understands the shock the decision will cause for the victim's family, the board must abide by the law.
"If we come to the view that someone is not going to be an undue risk, the law requires us to release them. It's as simple as that," Judge Sir David Carruthers told the Dominion Post.
"We still have the third rule in New Zealand, unless the court specifies differently. If you've done a third of the sentence, we must see you by law for parole to be considered."
Bragger has also appeared in front of the board recently, however has had here parole declined, the Dominion Post reported.
Mr Piper's partner Hanna Lark told the paper it was too early for Hawke to be released.
"He was only sentenced in February. He has not spent enough time in jail. We are still grieving the loss of Son and still dealing with everything that happened."
Hawke will have a curfew on his released and will have restrictions on where he can live.
- Herald Online staff