He said police should be allowed discretion to decide whether prosecution was appropriate. "The police already have all the powers they need," he said. A senior London magistrate has also spoken out on the issue. Caroline Healy, a magistrate at adult courts in Highgate and Barnet, said the current debate on knife crime and gang culture was unhelpful as it focused on crime and not on the reasons why young people are turning to gangs and weapons. She said: "We need to identify children's needs early to avoid them ending up in the criminal justice system, which does not help them one little bit to address their problems. Ms Healy, 53, who works as a government adviser on children's services and is a former director of children's helpline Childline, said: "We have to ask why they need to have the comfort of gangs in order to function. The extent of today's gang culture is what's worrying." She said it was a "sad reflection on our society that life is so cheap".