UPDATE: A 19-year-old Koondoola man has been charged with murder over the death of a 57-year-old woman.
The victim, the man's stepmother, was found dead in her Koondoola home yesterday.
The man is still under police guard in Royal Perth Hospital and a bedside hearing is planned for tomorrow.
The victim's husband has described the moment he discovered her body yesterday.
Sally Kaur had multiple stab wounds when she was found at her Edgington Crescent home.
Police and St John Ambulance crews were called to the scene about 4.30pm after Mrs Borbil's body was discovered.
John Borbil said he knew something was wrong when his wife did not answer his telephone calls in the afternoon.
He said he returned home in his truck and looked through the kitchen window where he saw his wife in a pool of blood.
She is understood have suffered stab wounds to her body and face.
Mr Borbil said a safe in the house had been opened.
Mr Borbil went across the road to the house of his neighbour Kevin Hawkins, who rushed to the scene.
"He was frantic, it's hard to explain," Mr Hawkins said.
"The truck pulled up, John went there to have a look and the next minute he's coming here calling me."
Mr Borbil said he was shocked at the loss of his wife, who had a "big heart".
Mr Borbil, who originates from Romania, and Ms Kaur, who is from Singapore, met through a mutual friend five years ago and were married in 2010.
"She was a lovely lady, she loved me and respected me," he said.
"I don't think I will find anymore women the same as her."
Ms Kaur had been working as a bookkeeper for her husband's transport business and the couple planned to visit Melbourne for Christmas this year where one of Mr Borbil's children lives.
Family friend Neil Cojenel, who introduced the couple five years ago, said he rushed to see Mr Borbil after hearing about Ms Kaur's death this morning.
He said Ms Kaur was a good person and her death had come as a big shock to those who knew her.
"She never upset anyone," Mr Cojenel said.
Mr Hawkins said Ms Kaur was a good friend who often visited with meals she had cooked for her neighbours.
Mr Hawkins, who has lived in the area for 32 years, said this was the first time anything like this had happened on the street.
Forensics officers and the Major Crime Squad are investigating at the scene.