Robert Knox had every reason to look forward to life. Only a few days earlier he had finished filming his part in the latest Harry Potter film, The Half Blood Prince.
Playing the role of Marcus Belby, a Ravenclaw student at Hogwarts school, alongside Hollywood star Daniel Radcliffe was surely going to be the start of a promising career.
Little wonder that Robert was in a good mood when he joined friends for a drink at the Metro bar, close to the home he shared with his family in Sidcup, a middle-class suburb of south-east London.
But within a few hours of waving goodbye to his mother he was lying bleeding to death on the pavement.