article_snippet: A 13-year-old boy has pleaded guilty to murdering a builder after a row outside a block of flats, making A 13-year-old boy one of Britain's youngest killers.
article_snippet: A 13-year-old boy has pleaded guilty to murdering builder Christopher John Barry after a row outside a block of flats, making the teenager one of Britain's youngest killers .
highlights_snippet: Boy, 13, admits stabbing a builder outside a block of flats in north London .
  