The last time a 26-year-old plunged a knife into his father's long-time friend it went so deep the handle as well as the 20cm blade penetrated the man's chest, a court has been told.
Cody James Finemore admits stabbing 55-year-old Peter Ward, but pleaded not guilty to murder at the start of the Brisbane Supreme Court trial on Tuesday.
In the months before Mr Ward's death in November 2019 he and Finemore, now 26, both had a sexual relationship - one paid and the other "spontaneous" - with the same woman, the jury was told.
Prosecutor David Nardone said Finemore and his father were living in Mr Ward's house in Marsden, south of Brisbane, at the time of the stabbing.
But no one else was present when Mr Ward - who had been Matthew Finemore's friend for about 20 years - was attacked.
Neighbours and people in a parked car heard a commotion from Mr Ward's house about 8pm before seeing him and Finemore on the patio.
Mr Ward called for his neighbour Mark Clements as the two men appeared to wrestle before Finemore ran off.
When Mr Clements reached Mr Ward, who was covered in blood with a knife still protruding from his body, his friend made "a dying declaration", Mr Nardone said.
"Peter Ward said, 'Cody, the little prick, stabbed me'."
Mr Nardone told the court Finemore stabbed Mr Ward five times, the last blow so deep that about a quarter of the 12cm handle was in his chest, as well as the 20cm-long blade.
Mr Ward died soon after in hospital, while Finemore was arrested that night at a friend's house.
Finemore's father Matthew told the court the men "got along well" and he never saw conflict between them.
But Kelly Thornycroft said the men had a "stressful" relationship, arguing because Mr Ward wanted Finemore to move out his house.
Ms Thornycroft told the court she met Mr Ward years before when he was watering his lawn and she asked for a cigarette.
Their friendship developed into a "sexual payment arrangement" for 15 to 30 minutes on a Saturday afternoon.
Ms Thornycroft also had sex with Finemore when her arrangement with Mr Ward stopped, but it was "spontaneous" rather than a continuous relationship, she told the jury.
The relationship between Ms Thornycroft and Finemore ended because "it was making Pete upset", she told the court.
The trial continues before Justice Sean Cooper.
