His relationship with Goerdeler allowed him to come into contact with Claus von Stauffenberg .
Through his participation in the Cologne - resistance circle , Kaiser became a close associated of the former Mayor of Leipzig , Carl Goerdeler .
Kaiser 's relationship Carl Goerdeler Goerdeler allowed him to come into contact with Claus von Stauffenberg .
Through his participation in the Cologne - resistance circle , Kaiser became a close associated of the former Mayor of Leipzig , Carl Goerdeler .