The High Court jury deciding the case in which a gunman shot two men, one of them fatally, in a Papakura street has retired for the evening.
Isaac Cruz Eru Broughton has denied charges of murdering 26-year-old Shon Wanahi and wounding Bunji Fenton with intent to cause grievous bodily harm.
Justice Venning told the jury in the High Court in Auckland they must decide whether Mr Broughton was acting in self-defence.
The court has heard how Mr Broughton pointed a shotgun at the two men, near the Papakura train station in March last year, before getting into his car.
When the men challenged him and began punching him through his open car window, he shot them both.
Justice Venning told jurors they must decide what Mr Broughton believed the threat to be and whether the force he used was justified.