The former student who killed nine students and a teacher at a school in Austria and then took his own life planned the attack in detail, but he appears to have shot his victims at random and investigators still haven't been able to ascertain his motive, officials said Thursday.
The 21-year-old had left the BORG Dreierschützengasse high school in Graz three years ago, breaking off his studies after attending for three years, police said. They said they knew of no personal connection between the gunman and the students he shot, but that one of the two teachers he shot had once taught him. They were still investigating whether that was a factor.
