Threats of violence at schools have been on the rise since 17-year-old Tim Kretschmer went on the rampage at a school in Winnenden, Germany, killing 15 people. A 17-year-old was arrested at his school in Ennepetal in...
UPDATE: Police say they are "not 100% sure" whether the chatroom warning attributed to Tim Kretschmer is genuine.-------The 17-year-old gunman who killed 15 people at a school in Winnenden, Germany had warned of the...