The jury in the Antonie Dixon trial has retired to consider its verdict.
Antonie Dixon, 40, is charged with murder for fatally shooting James Te Aute and seriously injuring two women with a samurai sword in 2003.
Justice Williams took almost four hours on Thursday to sum up the complex legal arguments in the case.
Much of his time was spent telling the jury how to consider the issue of insanity.
The defence says Mr Dixon was insane at the time - although it also says he shot Mr Te Aute in self-defence.
The Crown says the accused carried out the crimes in a cool and intentional manner, that he knew what he was doing, and he was not insane.
The jury has five other charges to consider relating to the same day. They include taking a hostage, illegally using a firearm and breaking and entering.
