The Hamilton Police Department said shortly after 9 p.m., a 911 call arrived about a man in need of medical attention in the King Street East and Sherman Avenue area.
Police and paramedics responded to the scene and found a 39-year-old injured man.
One of the police officers who responded recognized the man, police said, and knew he was living in a nearby building.
Det.-Sgt. Peter Thom told reporters on Tuesday that police were able to enter his apartment with the help of the building superintendent.
“The way the man was found, the extent of his injuries, they thought other people might be concerned,” Thom said.
Upon entering the man’s third floor unit, officers found a woman inside the apartment suffering from “signs of trauma.”
She was later pronounced dead by paramedics.
Members of the major crime scene have resumed the homicide investigation, but officers have yet to publicly identify the victim.
“We have a sense of who she may be, but we are working to solidify her identity and visit her next of kin,” Thom said.
Police have also not released the woman’s cause of death.
The injured man at the scene, who has now been identified by investigators as Shaun Chiasson, was taken to hospital for treatment and was subsequently charged with second degree murder.
Police did not say how Chiasson was injured or whether the injuries were self-inflicted.
The accused, Thom said, has had “minor issues” with the Hamilton Police Department in the past.
Officers continue to search for evidence and examine the crime scene.
“We are still processing the apartment. Our forensic officers worked through the night like we all did, ”said Thom. “We searched in and around the area outside and no weapons were found. ”
Police ask anyone with additional information about the homicide to call the police or Crime Stoppers anonymously.