A woman, injured in a disturbance that left a man dead, remained in hospital on Thursday as police continued their probe into the Kambah incident.
Nearby residents reportedly heard a woman scream for help and one neighbour called police after hearing a loud argument at the Everard Place home about 2.20am on Wednesday.
When officers arrived they found the man dead and the woman injured inside the home.
She was taken to Canberra Hospital with serious injuries and was helping police with their inquiries.
An ACT Health spokeswoman said the woman remained at hospital in a stable condition on Thursday afternoon.
Police would not confirm whether or not she was under police guard or had been interviewed by detectives.
ACT Policing has so far refused to be drawn on the pair's relationship or the man's cause of death and have not released personal details of the two people involved. They have, however, ruled out any third parties.
No arrests have been made and their investigations are continuing.
Police tape, which had blocked the street, was taken down on Wednesday night but the house remained fenced off and a tent was erected in the front yard as police came and went from the property on Thursday morning.
Forensic investigators continued to examine the scene, while markers and purple spray paint could be seen on the driveway and front yard of the house and neighbouring property.
Few neighbours could recall details of the home's residents but said they were shocked the tragedy had happened in their quiet street.
One man, who has lived in the area for more than 20 years, previously said he heard a woman's screams coming from the property about 2.25am.
"She called many times before, 'help'," he said.
"It sounded like she had come outside and was screaming for help.
"It was a very deep sound I could hear. When that happens to you, you live with that for a long time."
It is the first suspicious death in Canberra this year and the second in the past two months.
Police are still investigating the death of Evatt man Andrew Carville after his body was found on defence land at Majura in late November.
Any information to Crime Stoppers on 1800 333 000, or at act.crimestoppers.com.au. Quote reference P1440453.