Zarn Tarapata has been found guilty of the murders of two store workers at Ezy Cash in South Auckland.
The jury of 10 has unanimously rejected Tarapata's defence that he was not guilty on the grounds of insanity after deliberating for three and a half hours.
Tarapata admitted stabbed Paul Fanning, 69, and Paul Matthews, 47, to death last July in a lunch room at the back of the Takanini store.
A large group of family members of the victims and a few of Tarapata's supporters have attended the two-week trial.
His defence said he was suffering from a disease of the mind, schizophrenia, and he did not know at the time that his actions were morally wrong.
