An investigation into the murder of slain pizza shop owner Jordan Voudouris has taken a "disturbing twist" after the vandalism of tributes left outside his Paeroa shop.
Voudouris, 55, was found dead in pool of blood in a driveway behind his business Mykono's Pizzas early on Monday last week.
A homicide investigation was launched after a post-mortem confirmed the death was suspicious.
Police said flowers, balloons, cards and other memorial items left outside Voudouris' shop to mark what would have been his birthday on Saturday were vandalised.
Detective Senior Sergeant Michael Whitehead said police were now investigating the vandalism to find out whether it was linked to the murder.