Retailer Michael Hill Jeweller is trialling DNA sprays in its stores to combat burglaries.
The jewellery stores have been targeted by ramraids and smash 'n' grabs several times in the past year, most recently in Auckland's Albany on Friday night.
DNA spray is just one of the remedies available along with the use of fog cannons.
Co-director of SelectaDNA Graham Zuill explains how DNA sprays and fog vannons work.
DNA spray under blacklight Photo: SelectaDNA / Facebook
