This BBC News investigation by reporter Daniel De Simone identifies a new suspect in the Stephen Lawrence murder. Stephen’s killing in 1993 changed policing and race relations in Britain forever, and its shadow hangs over the Metropolitan Police to this day. For decades, five men have been suspected of the attack, and in 2012 two of them were found guilty. Daniel De Simone has seen secret evidence and spoken to dozens of witnesses to publicly identify a sixth suspect for the first time. Evidence uncovered in this investigation also further implicates other suspects in the attack, and raises serious question of the police handling of the case over many years.