Corrections has decided to allow convicted murderer Phillip John Smith to wear his hairpiece in prison, but will be appealing the reasoning in a High Court decision on the matter.
Auckland Prison director Andy Langley is worried the court's decision on whether or not Smith should have been allowed to wear his toupee is "precedent-setting".
Smith last month took the Department of Corrections to court because it had prevented him wearing a hairpiece ever since he used one as part of a disguise to flee to Rio de Janeiro in November 2014.
At the time of his escape, he was on a temporary release while serving a life sentence for the 1995 murder of the father of a 12-year-old Wellington boy he had been molesting.
The High Court at Auckland ruled the department had failed to take into account Smith's rights under the Bill of Rights Act, and said Smith's fundamental right to freedom of expression was ignored.