Silent loner sat in on meetings

Richard Durn appears to fit all the characteristics of the loner who runs amok.

The 33-year-old's hobby is guns, he lives with his mother and is a familiar eccentric figure around the town hall in Nanterre.

Durn is a quiet man who has sat through the most boring meetings and rarely speaks to those near him.

The account of one witness, who said Durn's "eyes glazed over, like a zombie" as he fired, suggests a deeply disturbed man who was waiting to explode.