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The Drug Wars that Killed Olivia

When Olivia Pratt-Korbel was shot dead in her home, the nine-year-old became the youngest victim of Liverpool's drug wars. There have been dozens of deaths in the city as rival gangs fight for control of the lucrative drug trade. Reporter Bronagh Munro investigates how the city came to dominate the UK drug market and how organised crime brought death to Olivia's door.