Knife crime in London as we know too well remains a serious issue. Almost daily, police respond to stabbings across the capital. What is concerning both police and youth workers, is how the rows that lead to such attacks are now so often played out on social media. One father in Tottenham who has himself used the internet to try to talk teenagers out of violence said unless websites are better policed - the problem may never go away. ITV News London's Ria Chatterjee went to meet him today.
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