One of New Zealand's youngest murderers -- who shot his caregiver in the head as did a jigsaw -- has been granted parole after eight years behind bars

Jordan Nelson was 13 when he murdered Rosemaree Kurth, at her home near New Plymouth in April 2012.

The killer -- who's now 21 - was refused parole earlier this year.

Nelson will be a free man on December 9, subject to strict conditions for five years.

He'll be electronically monitored and banned from owning or using any firearm, explosive or ammunition.

A number of other conditions will continue until mid-2030.