A man on trial for an alleged knife murder in Lavington told multiple lies after the incident, says a prosecutor, with jurors asked if they can believe anything he says.
But a defence lawyer told a jury they would have reasonable doubt over whether Adam Azzi deliberately stabbed Lloyd Kennedy.
Azzi has pleaded not guilty to murdering Mr Kennedy outside a Webb Street home and threatening his friend Nathan Vercoe with a knife on November 6, 2016.
Barrister Eric Wilson said it was possible it was an accidental stabbing with two bodies coming together, rather than being deliberate.
Prosecutor Paul Kerr summed up the crown case in the Supreme Court on Tuesday.
It's alleged Mr Kennedy and Mr Vercoe attended the home to collect a $200 debt, Mr Vercoe spoke to Azzi, and the pair walked away.
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Azzi allegedly came out with a table leg and knife, Mr Vercoe ran to him and grabbed a table top to protect himself, and Azzi lunged at him with the knife.
Mr Vercoe had told the court he had stumbled and saw Azzi and his friend "come together" on the road, before throwing the table top towards Azzi and finding his friend bleeding.
Mr Kerr said Mr Kennedy had been attacked while going to the aid of Mr Vercoe, and neither had knives.
He spoke of a letter from Azzi to his daughter which said he was the victim of a home invasion on the night.
Mr Kerr said Azzi had failed to mention anything about a home invasion to his daughter during a call on the night of the incident or to his friends Ben Heather and Amanda Whiting.
The court heard he exercised his right to silence when interviewed but stated in the letter he hadn't been able to give his version to police.
"That's just a lie, along with the lie about the home invasion, along with the lie about 'I didn't have the knife in my hands'," Mr Kerr said.
He said he had made three "critical" lies.
"Can you believe what he says?" Mr Kerr asked the jury.
"He's prepared to lie to his daughter about what's happened."
Azzi wrote that the pair attended the Webb Street home with knives while he was unarmed.
Defence barrister Eric Wilson has raised self defence in court, and told jurors manslaughter was open to them as an alternative to murder.
Mr Wilson said among the elements needed to be proved in the trial was that Azzi deliberately struck Mr Kennedy.
"That's an issue in this case," he said.
He said there was no evidence of any hand movements and the knife wasn't seen by Mr Vercoe.
He also asked if the knife was in the hands of the accused, if he used it to strike Mr Kennedy, and if he did so with the intention to kill him or cause grievous bodily harm.
The case continues.