In Canadian town stunned by shooting perpetrated by one of its own, there is anger, but also a prevailing sense of duty

Residents of the Canadian mining town Tumbler Ridge largely agree that Tuesday 10 February began like a normal day. The cloudy haze that settled over the valley was typical. So, too, was the chill of winter.

There were no hints that the quiet and comfortable routine of daily life in the mountains would be irrevocably shattered in one of Canada’s worst acts of mass violence.