A Sydney jury has heard an actor deny hiding the samurai sword used to kill a man was because he realised his actions were "totally unnecessary".
Blake Thomas Davis, 31, has pleaded not guilty to murdering Jett McKee shortly after the intruder fled Davis' Forest Lodge unit in August 2018.
Davis used a samurai sword on display in his home to deal the fatal blow before wrapping it in some plastic near his unit.
"You concealed the bloody sword and then you ran because you knew you had used the sword on Mr McKee and you knew it was totally unnecessary, didn't you?" crown prosecutor Chris Taylor asked on Friday.
"No," Davis replied from the witness box in his NSW Supreme Court trial.
Davis and his girlfriend Hannah Quinn have told the trial Mr McKee stormed into the unit, tried to rob them, pointed a gun in their face and then punched Davis in the face with knuckledusters.
The actor said he woke up on the ground thinking he'd been shot because of a bloodied face and an inability to see from his left eye.
Besides hearing Quinn screaming from outside, he says he didn't know where she or Mr McKee were and took off down the road with the sword.
Davis denied he chased after Mr McKee because he thought the intruder deserved to "at least be seriously injured" or that Quinn told him "no, don't" when he went to swing at Mr McKee.
"I believe she said something when I was behind her .. to the gunman," he said.
Mr Taylor said Davis had "spent a long time coming up with a false story" and that there was no threat to Davis when McKee was running from the unit.
"Not to me, but to Hannah, yes there was," Davis replied.
He told the trial on Wednesday he thought she would be killed and an alarm went off in his head that "I have to save Hannah".
Mr Taylor put to Davis that he "chased" Mr McKee 80 metres down the street .
"I ran 80 metres down the road to save Hannah," Davis replied.
Mr Taylor said: "Every step of the way, the threat had gone from Jett McKee being the threat ... the threat then turned - he was under threat from you and Hannah, wasn't he?"
Davis said he couldn't agree with that.
He said he couldn't remember the moment he used the sword or if Quinn had said "What the f*** have you done" afterwards.
Davis and Quinn spent the next few days living in hotels before seeking legal advice and going to police.
Both were charged with murder but the trial judge on Wednesday ordered the jury return a not guilty verdict for Quinn, due to the lack of a case against her.
She remains charged with being an accessory after the fact.
The trial continues.
