On December 11, 2012, a shooting occurred at the Clackamas Town Center in the relatively urban section of Clackamas County, just outside the city of Portland, Oregon, United States. The gunman, 22-year-old Jacob Tyler Roberts, ran into the shopping center wearing black clothing and a "Jason Vorhees" mask and sporadically opened fire using a Stag Arms AR-15 rifle stolen from a friend. He fired a total of 17 shots, killing two people and seriously wounding a third. Many shots were ricochets. Having attempted to reload his weapon and dropping three magazines, Roberts entered an employee only back stairwell that runs behind all stores in the mall and committed suicide after descending one level. He had no connection to any of his victims, and it was believed to be a senseless and random act of