PORTLAND, Ore. (AP) — Police say a man is facing murder charges in the death of a 22-year-old woman in the Portland suburb of Gresham. The Oregonian/OregonLive reports Brian Washington II was arrested Sunday after police began investigating the death of Iryonna Bynum at a Gresham home. Police initially responded Tuesday on reports that a woman, identified as Bynum, was not breathing. Police would not say the manner in which she was killed. But they said an autopsy revealed the cause of death was homicide. Washington has pleaded not guilty to one count of second-degree murder constituting domestic violence. While the charge includes a domestic violence component, police have not specified the nature of their relationship.