Former financial adviser Jacqui Bradley has been found guilty of 75 fraud charges after allegedly running a Ponzi-type scheme with her late husband Mike.
The charges were laid following the collapse of B'On Financial Services, which Bradley ran with her late husband Mike until it collapsed in December 2009, owing more than $15 million to 28 investors.
The jury at Auckland District Court deliberated four and a half hours before finding her guilty of charges including theft by a person in a special relationship and dishonestly using a document, Fairfax reports.
Bradley's lawyer Ron Mansfield said her husband, who died in April 2011, had been the driving force behind the business while she took care of administration and other subordinate roles.
But prosecutor Kristy McDonald said the couple had worked as a team.
She said investors' money was used to pay back other investors - a practice known as a Ponzi scheme - and also for personal expenses like their mortgage, a BMW and school fees.
Bradley will be sentenced on October 19.