(Portland, OR) -- An investigation is ongoing in Washington County after a woman allegedly shot her estranged husband to death in self defense during an argument. Sheriff's officials say the woman called 9-1-1 yesterday to report the shooting at her home on Northwest Germantown Road. Police say the couple was going through a divorce and that the man had come over to collect his things. The woman says they began arguing and he pulled a gun on her, prompting her to pull out her own gun and shoot him. First responders tried to save the man, but he died at the scene.