Law expert on Greens' Darleen Tana scandal

A public law expert says it's likely going to be up to Darleen Tana to decide whether to quit parliament, now she's no longer a Green Party member. Ms Tana has resigned from the party following the release of a report on allegations of migrant exploitation at her husband's business, but remains an independent MP. She rejects the reports findings. University of Otago law professor Andrew Geddis spoke with Corin Dann.