A Supreme Court Judge has found a Perth father guilty of lighting his children on fire at their home almost two years ago.
Edward Herbert, 43, was on Monday found guilty of intending to unlawfully kill his two children at the family's Doubleview home in August 2015, just hours after his daughter's fourth birthday party.
Judge Lindy Jenkins heard during his trial in March the father, who works as a tiler, told his partner, "the werewolf is coming" before dousing his two daughters, aged three and seven, in accelerant and setting the three year old alight.
Judge Jenkins ordered a psychiatric report before she sentenced Herbert.
Related Content
Prosecution lawyer Amanda Forrestor also indicated she would make applications for mandatory violence restraining orders to be included in the sentencing.
During the trial, a policewoman held back tears as she described the moment she saw the three-year-old girl's head on fire in her cot.
Stephanie Bochorsky was off-duty at the time and watching television in her home when she heard an altercation between Herbert and his partner.
The officer testified that when she asked the woman if she was OK, she replied: "No, he's setting the kids on fire."
Constable Bochorsky ran into the house and smelled petrol.
"Her whole head was on fire," she said, as she took a moment to compose herself.
The officer covered the girl in a blanket to put out the flames and saw Herbert pouring the liquid over the older child in her bed.
Const Bochorsky told Herbert to get away from the children, but he did not respond and remained there.
"My main concern was to get the flames extinguished," she said.
The policewoman dragged the older girl out of the bed and bolted.
Ms Forrester said in her opening address of the judge-alone trial that the three-year-old was permanently scarred from the life-threatening injuries she suffered.
Ms Forrester said Herbert was a cannabis user and drinker, who was behaving strangely leading up to the incident, with his moods changing from happiness to anger.
Herbert's partner said in her statement tendered to the court that before the attack he seemed to be talking to himself and she was scared.
"I was trying to keep him calm as I was in fear for my life," she said.
She said at one point that night he told her: "The werewolf is coming at 12 o'clock."
Later, he said: "That's it bitch, I'm going to kill you."
He then said he would burn the children instead.
The woman said when she saw her burnt daughter she could "smell burning flesh" and the girl appeared to be in shock, screaming and crying.
A neighbour said in his statement that when he rushed into the house with a fire extinguisher he found Herbert drinking in the kitchen.
When he confronted Herbert, he replied: "They're my kids to do whatever the f*** I want."
Herbert then lunged at the neighbour with a knife, but the man hit him with the fire extinguisher.
Herbert was remanded in custody will be sentenced on May 15.
- with AAP