A father will spend at least eight years behind bars after his six-year-old son told police how he killed a friend with a hammer in an argument over money.
The 51-year-old, who cannot be named to protect the identity of his son, was sentenced in the Brisbane Supreme Court to 10 years in jail for the manslaughter of Ethan John Hunt in May 2014.
Mr Hunt's death was not thought to be suspicious until an autopsy found he died from a ruptured spleen and internal bleeding caused by a blow to his torso.
The man originally claimed Mr Hunt had collapsed at his house while he was drunk but his son, then aged six, told police he'd seen his father hit the 40-year-old with a hammer.
The son said his father was "really, really angry" at Mr Hunt, called him a c*** and struck him multiple times with the tool.
He said Mr Hunt then collapsed on the floor and defecated before his father put him in the bath to get clean.
It wasn't until Mr Hunt became unconscious that the man called an ambulance, the court heard on Monday.
Prosecutor Jodie Wooldridge said the man initially denied assaulting Mr Hunt but admitted he loaned him money to buy heroin for them both.
He later commented to police after they'd talked to his son that he was not going to get out of jail till he was old.
Justice David Boddice said the man had shown "scant regard" for Mr Hunt as he lay injured after the unprovoked attack.
"Your friend was lying on the lounge room floor having defecated himself and your response was to put him in the bath and tell him essentially to clean himself up," Justice Boddice said.
"Whether he was intoxicated at that point, you should have realised there was something wrong."
The man will be eligible for parole in early 2022.