Dayna Isaac was found dead at Penrith’s home after police officers took her new boyfriend Paul Sultana into custody

Dayna Isaac, 28, was found dead at a unit on Colless Street in Penrith, West Sydney, around 4.15pm on Monday

When police knocked on the door of a mother of two after neighbors reported hearing a blazing argument, they received no answer and could not hear anything inside.

But just 90 minutes later, at 4.15pm on Monday, police were back at the Colless St unit in Penrith, west Sydney, where they found the body of Dayna Issac, 28.

Officers were accompanied by the mother of her new boyfriend, Paul Sultana, who had called them, with her 32-year-old son, who is now in police custody.

The timetable of events was confirmed by NSW Police to Daily Mail Australia, with police being called to the unit for the first time between 2.30pm and 3pm on Monday.

A neighbor had called police to report “disturbance” from Ms Isaac’s home, but when officers showed up at the unit, no one answered the door and they left.

Officers found Ms Isaac’s car burned out at 3.45pm in bushland 8 miles from her home near Castlereagh in the north west of the city.

Half an hour later, Ms Isaac’s body was discovered by Mr Sultana’s mother, who came to see her.

She then drove to Penrith Police Station and reported her horror find to officers.

Mr Sultana was arrested around 3.25am on Tuesday and charged with her alleged murder around 5pm. He remains in police custody.

“Police were informed that there was a disturbance at the site and they attended and later found the deceased was at the site,” NSW Police Acting Superintendent Carlene Mahoney said on Tuesday.

Investigators have established crime scenes in the unit block and at Mr Sultana’s home.

Ms Isaac’s boyfriend Paul Sultana (pictured) is in police custody

Ms Isaac’s friend (pictured) said she was the “most beautiful, kindhearted and selfless” person she had ever met

Police are seen in the unit block after Ms Isaac’s body was found Monday afternoon

Daily Mail Australia understands Ms Isaac was not fully clothed when she was found.

Superintendent Mahoney said the pair have been friends for a long time but have only been together for about two months.

Police do not believe a gun was involved and say there was no history of domestic violence between Ms Isaac and Mr Sultana.

Mrs. Isaac’s two girls, aged one and three, were not at home at the time.

A friend of the mother-of-two said she was the “most beautiful, kindhearted and selfless” person she had ever met.

“She lit up the room and was the life of the party,” the woman, who asked for anonymity, told Daily Mail Australia.

“She was an incredibly loving mother to two beautiful girls who absolutely adored her and I am so proud to call her not only my friend but my sister.”

Police do not believe a gun was involved and say there was no history of domestic violence between Ms Isaac and Mr Sultana

Police are seen at the Penrith block of flats on Tuesday morning

The police and forensic technicians are on site

Another friend wrote on Facebook: “RIP beautiful girl I will miss you”.

“You were such a wonderful person. Every time I saw you You would always have a smile on your face,” said another friend.

People in the area were shocked by the news of their neighbor’s death.

A local resident said she saw police cars lined up on the street Monday afternoon when she got home.

“I just heard the news, I was shocked,” she said.

“This area is pretty quiet, you don’t hear that there is a lot going on here. It’s more in Cranebrook.”

Pictured is the block of flats where Mrs Isaac was found dead

Another woman, who lives in the same building as Ms Isaac, said she woke up this morning to find the property taped off and police officers searching the premises.

“It was pretty scary, I was at work yesterday and I found out through Facebook that a woman had died down my street,” she said.

“When I came home late last night there was only one police officer, but when I came out of the building this morning they were everywhere.”

Police are encouraging anyone with information that may assist the detectives to come forward and contact Penrith Police Station or Crime Stoppers.