One woman yelled: "You're guilty c*** - you killed my f***ing nephew."
A post-mortem examination revealed Mr Culling, who was just 26, died a violent death and had been shot once in the head. Police said he was possibly killed in another location before being dumped near the block of flats at Taieri Court.
A team of 20 officers worked on the investigation and made an appeal to the public asking for anyone for who had seen Mr Culling in the days before his death to make contact.
His family issued a statement shortly after his death saying they were lost for words and "we truly cannot believe this has happened to our Sam. It's an absolutely horrendous situation and so difficult to fathom".
Mr Culling is the son of former Black Power head John Whatuira and the nephew of James Poto Whatuira, who was fatally shot in Woodville in January.