A man who plunged a butcher's knife deep into the chest of his father's best friend has been found guilty of murder.
Cody James Finemore admitted stabbing Peter Ward, but pleaded not guilty to murder at the start of the Brisbane Supreme Court trial.
But a jury did not accept Finemore's version, finding the 25-year-old guilty on Wednesday after deliberating for about five hours.
In the months before Mr Ward's death, he and Finemore both had a sexual relationship - one paid and the other "spontaneous" - with the same woman, the court was told.
Finemore and his father were living in Mr Ward's house in Marsden, south of Brisbane, at the time of the stabbing on November 8, 2019.
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.
They appeared to wrestle before the younger man ran off.
A neighbour found Mr Ward covered in blood with a knife still protruding from his body.
The man made "a dying declaration", saying: "Cody, the little prick, stabbed me."
Mr Ward sustained five stab wounds, the last blow so deep that about a quarter of the 12cm handle was in his chest, as well as the 20cm-long blade.
He died soon after in hospital, while Finemore was arrested that night at a friend's house.
Finemore said he stabbed Mr Ward during an argument about moving out the house where he had been living for six months.
Kelly Thornycroft told the court she had a "sexual payment arrangement" with Mr Ward and at other times a "spontaneous" rather than continuous sexual relationship with Finemore.
Mr Ward's mother said so many lives had been ruined by the actions of Finemore who took Mr Ward's life "for no apparent reason".
His daughter told the court her father would have done anything to help anyone.
But never thought an act of kindness would result in the end of his life.
"It breaks my heart that my son will never know his grandad," she told the court.
Justice Sean Cooper handed Finemore a mandatory life sentence.