The anatomy of family murder - the patterns and warning signs

It’s the most shocking and grisly of crimes: a seemingly everyday person suddenly, savagely, inexplicably, kills themselves and their kin. We find family annihilation too horrific, too cruel to grasp, so explain it away as random acts of lunacy. But Godfrey Holmes says there are patterns and warning signs – and if we learn to look for them, we may begin to stem the bloodshed