In November 1990, thirteen people were shot and killed in the seaside village of Aramoana. Tim Ashton was a member of the anti-terrorism squad that was sent in to stop the gunman.
Thirty-three year-old David Gray began shooting after a confrontation with one of his neighbours over a dog.
By the end of his rampage, 13 people were dead and several others were injured.
The police's anti-terrorism squad was sent in to stop David Gray's shooting rampage.
It is New Zealand's second deadliest mass shooting, after the Christchurch mosque attacks which saw 51 people killed.
Tim Ashton was a member of the Anti-Terrorist Squad who was sent in to stop Gray. He shares his recollections of the day and his subsequent battle to change gun legislation.