A man who hammered a stranger to death before attacking two police officers with knives has been found not guilty by reason of insanity.
David Fa was found guilty of murder and sentenced to life with a minimum non-parole period of 14 years for the murder of Stuart Stone in January 2006.
But that was overturned by the Court of Appeal after the court found it was likely that he was suffering from schizophrenia at the time.
After hearing evidence from psychiatric assessors at the High Court in Auckland on Thursday, Justice Katz found Mr Fa not guilty by reason of insanity and remanded him to the Mason Clinic as a special patient.
Mr Fa will remain at the clinic until he is deemed to be no longer a risk to the community.
According to the original sentencing notes, Mr Fa attacked Mr Stone with a hammer on the side of the road in the Auckland suburb of Westmere. He later also attacked two police officers.