He died in the driveway of his home when police returned fire.
Waitematā District Commander Superintendent Naila Hassan said other tactics were used before lethal force, such as firing a sponge round and releasing a police dog.
Hassan referred to the incident as “complex and rapidly evolving” with police forced to make “quick decisions to keep people safe”.
“The decision to use lethal force is not something our officers ever want to do and is a last resort,” Hassan said.