The boyfriend of a Western Sydney mother has been charged with murder after her body was found in a Penrith unit on Monday.
The body of 28-year-old Dayna Isaac was found on Monday afternoon by the mother of Paul Sultana, who was charged with her murder on Tuesday afternoon.
Mr Sultana did not appear in person or apply for bail when his case was heard in Penrith Local Court this afternoon.
He will remain in custody until his next court appearance in March.
Mr Sultana's lawyer Parham Mohammadian spoke briefly outside court today, saying "we just to urge everyone to keep an open mind until the actual facts come out".
Ms Isaac's grieving father Garry English, who is now caring for her two children, attended the court hearing, but did not want to comment on the case.
Acting Superintendent Carlene Mahoney said Mr Sultana had known Ms Isaac for a long time.
"There was a relationship between the two … a long relationship as [a] friendship [which] recently became more intimate," Acting Superintendent Mahoney said.
"We don't have any reports of domestic violence beforehand."
Police were called to the unit on Monday morning for a "disturbance", she said.
She told reporters it was too early to say how Ms Isaac died, but police were not looking for a murder weapon.
A crime scene at the unit is being examined by specialist forensic police.
It's understood Mr Sultana's mother discovered Ms Isaac's body and went to police.
That was following a neighbour reporting hearing an argument on Monday afternoon and raising the alarm.
Officers attended the unit and knocked on the door, but received no answer.
A short time later, a car — believed to be owned by Ms Isaac — was found torched and left in bushland at Castlereagh, about a 15-minute drive north of the Penrith unit. It was towed by police from the area near Post Office Road and taken to be examined by the forensic team.
At 3:30am on Tuesday, officers from the Tactical Operations Unit arrested Mr Sultana at a house in Robinson Road, Cranebrook.
Strike Force Diere — with detectives from the Nepean Police Area Command and the state's homicide squad — has been formed to investigate the circumstances surrounding the woman's death.
Police are urging anyone who may have any information to come forward.
