Convicted murderer Clayton Weatherston is seeking leave to appeal to the Supreme Court against his conviction for killing his former girlfriend Sophie Elliott.
He applied to the court last month and has until the end of next week to file written submissions.
In June, the Court of Appeal dismissed his appeal against his conviction for killing his ex-girlfriend, saying Weatherston got a fair trial.
Weatherston was found guilty of murdering Sophie Elliot, 22, in January 2008 in Dunedin and sentenced to life imprisonment, with a minimum non-parole period of 18 years. He stabbed her 216 times.
His lawyer, Robert Lithgow QC, argued in the appeal court that public debate about the controversial defence of provocation meant Weatherston did not get a fair trial.
Once Weatherston's written submissions have been filed the Crown then has 15 working days to file a response.
The Supreme Court will then consider the application for leave to appeal.
