A hearing starts on Monday to determine the scope and form of a coronial inquiry into the death of the LynnMall terror attacker more than two years ago.
Ahamed Samsudeen was fatally shot by the police after stabbing multiple people in a West Auckland supermarket in September 2021, shortly after his release from prison.
Coroner Marcus Elliott will conduct the hearing, which is set down for two-and-a-half days in Auckland.
He will consider the findings of five state agency investigations and previous judicial decisions and hear submissions from survivors, the police, Immigration, Corrections and Samsudeen's family.
He will also consider whether a public hearing, an inquest, is warranted.
Coroners investigate the facts of a death and can make recommendations to help prevent similar deaths.
Samsudeen seriously injured four women and one man with a knife during the attack at Countdown in LynnMall in 2021 before he was shot dead by police who were following him.
Another man suffered a minor wound, and a third dislocated his shoulder while trying to stop the attack.
Samsudeen had been monitored since 2015 because of his interest in the Islamic State and he was arrested at Auckland Airport in 2017. The authorities believed he was a threat to national security and that he was trying to join ISIS in Syria.
He spent most of the next four years on remand in jail.
In May 2021, he was found guilty of possessing undesirable publications. Due to the length of time he had spent in custody, he was sentenced to a year of supervision.
He carried out the LynnMall attack just months later.
There have been five state agency investigations into the events leading up to Samsudeen's death, addressing a range of factors including his background, the police response, Corrections' management of him in custody and on remand, and Immigration's involvement from the time he entered New Zealand.