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Thirteen years after their son's racist murder, Stephen Lawrence's parents continue their fight for justice. Meanwhile, DCI Clive Driscoll finds Stephen's cold case files.

DCI Driscoll tries to win the trust of the Lawrence family and key witnesses. After a forensic breakthrough, the team needs to prove the integrity of the evidence before they can make arrests.

Gary Dobson and David Norris stand trial for Stephen's murder. The defence argue that potential cross contamination in the years since the murder makes forensic evidence unsafe.