The ATF Bureau says thirteen weapons, six from the school and seven from Mercer’s residence, were purchased legally. All of the weapons were traced to a federal firearms dealer. Seven of the weapons were purchased by the shooter or his family members in the last three years. Law enforcement also recovered a jacket with steel plates and additional magazines.
Bureau of Alcohol Tobacco Firearms & Explosives (ATF) Chris Harper Mercer Umpqua Community College Shootings