▁was ▁sent enced ▁to ▁three ▁years ' ▁prison ▁for ▁the ▁escape ▁and ▁associated ▁cr imes . ▁ ▁Par ole ▁Board ▁decision ▁to ▁release ▁▁ ▁Bur ton ▁spent ▁ 1 4 ▁years ▁in ▁prison ▁from ▁ 1 9 9 2 ▁to ▁ 2 0 0 6 . ▁He ▁returned ▁a ▁number ▁of ▁positive ▁drug ▁tests ▁in ▁prison ▁but ▁managed ▁to ▁avoid ▁positive ▁tests ▁in ▁the ▁last ▁three ▁years ▁before ▁he ▁was ▁par o led . ▁He ▁participated ▁in ▁the ▁violence ▁prevent ion ▁programme ▁after ▁the ▁New ▁Zealand ▁Par ole ▁Board ▁regarded ▁him ▁in ▁ 2 0 0 4 ▁as ▁" at ▁high ▁risk ▁of ▁re - off ending ▁if ▁released ". ▁In ▁September ▁ 2 0 0 5 ▁he ▁was ▁denied ▁par ole ▁again ▁because , ▁through ▁no ▁fault ▁of ▁his ▁own , ▁the ▁board ' s ▁earlier ▁recommendation ▁that ▁the ▁Cor re ctions ▁Department ▁ar range ▁temporary ▁esc orted ▁releases ▁to ▁test ▁his ▁conduct ▁away ▁from ▁prison ▁was ▁not ▁ful filled . ▁However , ▁the ▁board ▁was ▁im pressed ▁by ▁information ▁that ▁indicated ▁apparent ▁progress , ▁in ▁particular ▁that ▁" in ▁the ▁last ▁two ▁years ▁his ▁conduct ▁has ▁been ▁described ▁as ▁im pe cc able ". ▁But ▁it ▁wanted ▁one ▁more ▁psych ological ▁assess ment ▁done ▁on ▁him . ▁ ▁The ▁board ' s ▁decision ▁to ▁release ▁Bur ton ▁was ▁made ▁at ▁a ▁hearing ▁in ▁June ▁ 2 0 0 6 , ▁and ▁it ▁ordered ▁his ▁release ▁on ▁ 1 0 ▁July . ▁The ▁final ▁psych ological ▁assess ment ▁had ▁been ▁done ▁and