A private investigator has complained to Auckland Council and the Serious Fraud Office about a trust that was the biggest donor to disgraced Auckland mayor Len Brown's election campaign.
Grace Haden, who stood unsuccessfully for the council in October on the Transparency New Zealand ticket, asked council chief executive Doug McKay, electoral officer Bruce Thomas and the Serious Fraud Office to investigate the New Auckland Council Trust.
Returns filed earlier this month showed Brown's successful campaign was funded by $343,375 in donations, with the biggest donor the New Auckland Council Trust, which chipped in $273,375.
The trust, which contributed $499,000 to Brown's 2010 mayoral campaign, allows donors to keep their identities secret.