An Ombudsman's report has found the Department of Corrections violated the rights of serial offender Arthur Taylor.
Taylor, who has more than 150 convictions, has made numerous complaints to the Ombudsman's office over his treatment at Auckland's High Security Prison in Paremoremo.
An investigation found that without the necessary paperwork, prison staff had placed Taylor in segregation for up to nine months and routinely denied him his daily allowance of one hour exercise.
The report also found that, after making threatening comments to staff, Taylor was moved into a cell that lacked power or running water, and was deemed unsuitable for keeping prisoners.
Corrections Minister Anne Tolley did not respond directly to the report, saying only that Taylor is a highly dangerous, disruptive and manipulative criminal.
