The serial sex offender dubbed the Beast of Blenheim will be released on parole in September.
Stewart Murray Wilson has served 18 years in prison for a catalogue of sexual and violent crimes against women and girls over the two decades leading up to his sentencing in 1996.
He was sentenced to 25 years behind bars for gross sexual offending over a 25-year period including rape, stupefaction, indecent assaults, bestiality and wilful ill-treatment of a child.
The 65-year-old was originally due for release in December 2008 because under old sentencing laws prisoners were released after serving two-thirds of their sentence.
However, the Parole Board requested extending his sentence to September 1.
Since then Wilson had received a six-monthly parole review and today a parole board denied him parole for the eighth and final time saying Wilson should not be released until September.
The parole assessment report said his risk of reoffending was "four times that of the average rate".
The board said he continued to deny responsibility for his offending and refused to engage in any programmes which could assist him in addressing his offending.
"In our view, the personal factors uniquely applying to this offender point to the strong likelihood of further similar sexually deviant behaviour occurring as soon as he has the opportunity to engage in it.''
The board said it was concerned that when Wilson was asked if he would adhere to not having contact with children under the age of 16, he said "I don't give a stuff about that".
The board said Wilson refused to participate in the preparation of the report and in particular to provide any information about his release proposals other than that he was working with Prisoners Aid and Rehabilitation Trust to find accommodation.
He also refused to indicate in what part of the country he intended to reside.
The board is restrained by legislation and cannot keep Wilson in prison past his release in September.