The shooter shared an image of his own feet clad in black leather combat boots while sitting in a toilet cubicle on the third floor of the school moments before launching his rampage

Artur A., a 21-year-old from a suburb of Graz, was pictured holding a cat in the first images to emerge since the horrifying attack.

Details emerge of how 21-year-old planned school attack in which teacher and nine pupils were killed

The shooter shared an image of his own feet clad in black leather combat boots while sitting in a toilet cubicle on the third floor of the school moments before launching his…