(Silverton, OR)  --  A Silverton police officer is escaping charges in the deadly shooting of a domestic violence suspect on Valentine's Day.  A Marion County grand jury ruled unanimously on Tuesday that Officer Timothy Hein was justified in his use of force when he fired a single shot at William Bluestone.  Hein and other officers were responding to reports that Bluestone was assaulting his wife and holding their three-month-old baby hostage when the shooting happened.  Police say Bluestone was hiding underneath a bed at the home and had told police he was armed when he suddenly shot himself in the chest.  The officers returned fire when they heard his gun go off.