A Hastings horticultural labour contractor's historic convictions for people trafficking and slavery could be challenged in the Supreme Court.
An application has been filed on behalf of Joseph Auga Matamata for leave to appeal the 23 convictions, which were imposed in the High Court in Napier last year after a trial lasting more than five weeks.
He was sentenced to 11 years' jail, the convictions and sentence being upheld by the Court of Appeal in a decision issued last month.
The Crown had also appealed, to the Court of Appeal, seeking a higher penalty, and it was ruled Matamata should serve a minimum non-parole period of five years in prison.
The Crown is understood to have been advised late last week of the new bid to New Zealand's highest court, and is expected to file a response before the Supreme Court will decide whether it will consider a second appeal.