Police investigating the murder of a schoolboy used the first anniversary of his stabbing to issue an online plea for information.
The week-long appeal appears on the Metropolitan Police Facebook page. Negus McClean, 15, pictured, was stabbed in the chest and thigh in front of his 13-year-old brother in Edmonton, north London, on 10 April last year following an argument about a mobile phone. It is believed that about seven young men on bicycles had chased him.
The teenager died in hospital that night and no one has been charged with his killing. His cousin, Noel, 25, said that Negus was killed defending his younger brother in a "selfless act".