The former top cop serving 4 1/2 years behind bars for covering up Louise Nicholas' original rape allegations will go to the Court of Appeal this week in a bid to have his conviction and sentence thrown out.
The basis of John Dewar's appeal, to be heard on Thursday, revolvesaround what he claims are inconsistencies and contradictions in some of the evidence Nicholas gave at his trial last year, and at the trials of former police officers Clint Rickards, Brad Shipton and Bob Schollum.
The self-employed father of four was chief inspector of the Rotorua CIB when Nicholas approached police in 1993 with historic sex allegations against Rickards, Shipton and Schollum.
Dewar was convicted of suppressing, discouraging and preventing any formal investigation or prosecution.
He was also found guilty of deliberately giving inadmissible evidence at two trials of another policeman facing rape allegations.
Dewar staunchly denied all the allegations, including that he manipulated Nicholas, who has gone to five trials as key witness.
The platform of Dewar's defence was that Nicholas had never told him of her rape allegations against the three former police officers. Dewar comes up for parole next year.