The case of Jahche Broughton, who murdered Scottish tourist Karen Aim in 2008, is a particularly disturbing one. Why, as coroner Wallace Bain, asked this week, had a 14-year-old boy been allowed to roam the streets of Taupo after midnight with a baseball bat? The situation appears all the more reprehensible given that Broughton had liquor and a seeming disposition to violent behaviour.
"It raises," said the coroner, "the standard and question of supervision and whether there should be any criminal or other responsibility for those who were supposed to be supervising him."
Dr Bain's frustration is understandable. He is also not alone in asking whether parents should be made more responsible for the behaviour of their children. Indeed, this has become a staple suggestion as the rate of juvenile crime escalates worldwide, and new solutions are sought.
Some provinces in Canada and states of Australia and the United States have reacted already, passing laws that range from punishing parents, ordering them to exercise better supervision, or ordering them to attend guidance counselling. California has one of the toughest.