A San Rafael man was arrested Friday on suspicion of killing a woman in her apartment in the Canal neighborhood, police said.
Robert Lee Bradley, 51, was booked on suspicion of murder, robbery, criminal threats and public intoxication. He was being held without bail.
The name of the victim was not released Friday. San Rafael police Sgt. Jim Correa said the woman had signs of blunt-force trauma, but an autopsy was pending.
The investigation began shortly before 7 a.m., when a man walked into an apartment building on Mill Street, near the victim's apartment, and told someone there to call 911.
When police arrived, they found the woman dead on her couch at 49 Harbor St., part of a two-story, four-unit building next to the San Rafael Canal. The woman lived on the lower floor.
The man who reported the death was identified as Bradley, a transient who knew the victim, who spent the rest of the day under questioning by San Rafael investigators.
Bradley told police he did not kill the woman. But several hours earlier, he and the woman had been in an argument and she called police, who told Bradley to leave the premises, Correa said.
Investigators also learned that Bradley had threatened to kill employees earlier that night at the 7-Eleven on Medway Road, Correa said. The victim's apartment was sealed off by evidence technicians, who remained at the scene late Friday night.
Several neighbors described theapartment building as a chronic site for criminal activity, and the building is listed for sale.
The incident is the first murder investigation in San Rafael since May, when a Corte Madera man was stabbed to death in a gang-related fight. Two suspects, both alleged gang members in their teens, are awaiting trial.