Fed up with his housemate's cruel and harsh behaviour toward him, Stephen Moore took action into his own hands.
"Maybe I should euthanise you," he told Peter Juhasz during a violent scuffle in April 2019 in Gisborne, in central Victoria.
He armed himself with a knife and violently stabbed his housemate-turned-new partner in the neck, severing his jugular vein and penetrating his spinal column.
Mr Juhasz was stabbed in the lungs, heart and liver and was beaten over the head, most likely with his own walking stick.
Mr Moore was found not guilty of murder on Tuesday, successfully arguing his violent attack was an act of self-defence.
Prosecutor John Dickie had conceded during a weeks-long trial that Mr Juhasz was particularly violent toward Mr Moore in the lead-up to the killing.
Mr Moore was treated harshly and cruelly by Mr Juhasz and was aggrieved by the physical and emotional abuse, Mr Dickie said.
The two men had been sharing a unit together in Gisborne for about a year before the incident.
Mr Moore said they'd been in a relationship for about two months. They loved each other but had their problems, he said.
People who knew Mr Juhasz described him as having a split personality, generally seeing him as sick and frail but also knowing an aggressive side, Mr Dickie said.
Mr Moore's lawyer Jarrod Williams said his client was terrified of Mr Juhasz and feared being killed by him.
They argued on that day in April, when Mr Moore said Mr Juhasz had been sarcastic and started going on about Mr Moore's family.
He said Mr Juhasz hit him across the chest with a walking stick and smashed his hand with a meat cleaver.
"In fear of his life, and in order to defend himself, he picked up a knife and stabbed Peter a number of times," he said.
He tied Mr Juhasz's body to an office chair with wire.
Mr Moore said Mr Juhasz was still blinking and breathing when he tied him up, and that he'd stabbed him once or twice again because he wouldn't die.
He wired shut the door to the room where Mr Juhasz was but stayed inside the house for several days.
Mr Moore played pokies at a local shopping strip before going to police, telling an officer he had killed Mr Juhasz in self-defence.
"He believed that Peter Juhasz was capable of regaining his strength and attacking him and so he remained terrified of him," Mr Williams said.
The verdict means Mr Moore, who has been in custody, is now free.