Siale Tinoai has been sentenced to 20 years in a Queensland jail for stabbing his housemate 200 times after their relationship soured following a dispute about a video game.
Prior to the murder, Tinoai drew a picture depicting himself, wrote the words, "Craig, you're gonna die" on it and left it on a table in their Brisbane sharehouse.
He and Craig Stuart Field, 43, shared a house for people with mental health care needs with three others in Slacks Creek in January 2013.
Their relationship soured after Mr Field wrongly accused Tinoai of stealing a video game.
On the day of the killing, a woman on the lower floor heard heavy footsteps above, then Mr Field yelling "help, help".
She ran upstairs to see Tinoai on top of him in the lounge room and repeatedly stabbing him.
Police and paramedics were called but Mr Field, a father of two teenage boys with intellectual disabilities, died at the scene.
Tinoai claimed Mr Field attacked him with scissors over the alleged theft of video games.
He said "sweet as" when police told him Mr Field was dead.
Tinoai, 27, was sentenced to life in jail in Brisbane Supreme Court on Thursday.
Justice Peter Davis opted against extending his non-parole period beyond the mandatory 20 years after considering his youth, violent upbringing and borderline personality disorder.
With time in pre-sentence custody already served, he could be released in 14-and-a-half years.
Mr Field died six days before a court date to determine if he was mentally well enough to get his children back from foster care.
His sister Heather Saint told the court it had put significant strain on the extended family over care arrangements for his two sons.
Australian Associated Press