A man in his 60s has been arrested for allegedly supplying Whangarei gunman Quinn Patterson with firearms.
Wendy and Natanya Campbell were fatally shot last month while at Patterson's Mt Tiger Rd address on a regular property inspection.
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Close friends of Patterson later revealed to Newshub he had been gathering an arsenal of weapons at his property, including firearms and grenades.
It's also since been revealed Patterson had linked someone else's firearm licence to his Trade Me account, which he used to purchase some of his firearms.
On Tuesday, police confirmed a 61-year-old man had been arrested relating to the crime.
He's been charged with six charges related to supplying firearms to an unlicensed person, including three charges on supplying military-style semi-automatic firearms.
He also faced three charges on possessing military-style semi-automatic firearms.
The man appeared in Whangarei District Court on Tuesday afternoon and is due to reappear in court at the end of the month.