A Qatari man who fatally stabbed his boyfriend's long-term partner in a jealous rage over their gay love triangle has been found guilty of his murder.
Mohammed Ahmed Almansouri, 39, did not make any visible reaction as a Supreme Court jury this afternoon found him guilty of murdering Texan Kenneth "Kenny" Horack, 48, who had been the partner of his boyfriend Ben Campbell for 17 years.
Mr Horack, who was visiting Mr Campbell, bled to death after being stabbed 14 times in a Subiaco unit on August 4 last year.
After hearing two weeks of evidence, the jury today rejected Almansouri's claim that he was acting in self-defence after Mr Horack stabbed him first.
Prosecutors had alleged Almansouri became increasingly insecure about his relationship with Mr Campbell and reached "breaking point" when he noticed photos of him and Mr Campbell in the loungeroom had been replaced with ones of Mr Horack and Mr Campbell.
When he was interviewed by police after the stabbing, Almansouri told them he "got like fire" when he saw the photos.
In his evidence last week, Almansouri, who had been in a two-year relationship with Mr Campbell, said in his defence that he did not have any issues with Mr Horack's relationship with Mr Campbell and claimed Mr Horack had bullied him and made him feel "unworthy".
On the night of the stabbing, he claimed there had been a third man in the house and he said Mr Horack had shouted at him and pushed him.
He said he grabbed a folding knife from his bedroom to "scare" Mr Horack to take down the photograph but a struggle ensued and he was stabbed in the buttocks first by Mr Horack.
Almansouri, who stood with his hands clasped and looked at the ground when the jury handed down its verdict, will be sentenced on February 1.