(Portland, OR) -- Portland Police have released the name of a man fatally shot by an officer and the officer's name. On October 4th, 28-year-old Nicholas Thorn was armed with what appeared to be a rifle. He was yelling and making threats in an apartment building. Officer Andrew Young fatally shot Thorn with a rifle. Young is a seven-year veteran of the Police Bureau. A 22-caliber pellet gun was recovered at the scene. Police have not said why Young fired. Young remains on leave during the investigation.