The 21-year-old, who meticulously planned the attack at his former high school in Graz, killed nine students and a teacher.

The Bureau of Alcohol, Tobacco, Firearms and Explosives has increased the reward available for information leading to the arrest of the alleged shooter of a 14-year-old boy in early June.

Who were the “peacekeepers?” And did they have any formal qualifications or training to be acting as armed security? Those questions, among others, remained unanswered Monday after a man marching in ...