Following the conviction of serial killer, Levi Bellfield, for the abduction and murder of 13-year-old Milly Dowler in 2002, this Crimewatch special reveals the inside story of how he was finally brought to justice. With exclusive access to Milly's closest family and friends, Kirsty Young speaks to Gemma Dowler about losing her younger sister and the fresh ordeal faced by her and her parents during Bellfield's controversial trial.