The 17-year-old who calmly gunned down his former classmates and teachers in Germany this week before taking his own life seemed like a normal teenager, Der Spiegel reports. Tim Kretschmer was inconspicuous and shy, schoolmates say, but he wasn't a loner and wasn't considered strange. Police say they have searched in vain for a farewell letter explaining the shooting spree that killed 15.
"Tim was never aggressive or conspicuous," said one former classmate. "He was simply normal—just like everyone else. I felt like I had been struck by lightning when I heard that he did it. For years I saw him every day, every day! Who would have thought that he had a ticking time bomb inside him?"