Was he obsessed? Authorities say an 18-year-old Iranian-German gunman killed seven teenagers and two others at Munich’s Olympia mall Friday. The shooter was “obsessed” with mass shootings and visited the site of a deadly 2009 German school shooting, police said today. A smartphone video shows him shooting a pistol toward fleeing pedestrians outside the eatery. There had been an apparent ISIS-inspired axe attack in Bavaria four days earlier, but investigators say Friday’s rampage wasn’t political, and the attacker had received mental health treatment and had researched student shootings.