Police said about seven young black men on bicycles had chased Negus before the murder.

BBC: Negus McClean murder: Mother makes Facebook appeal

Scotland Yard's appeal on Facebook and YouTube features emotional interviews with Negus's mother and sister.

BBC: Negus McClean murder: Mother makes Facebook appeal

But Negus, a member of DA, died from his injuries following the attack.

BBC: Negus McLean 15, 'murdered by hunting posse'

Social media websites are being used by police in an appeal for information about the murder of Negus McClean.

BBC: Negus McClean murder: Mother makes Facebook appeal

Negus McLean was killed during a so-called "post code war" in north London, a jury at the Old Bailey was told.

BBC: Negus McLean 15, 'murdered by hunting posse'

" Warrick Negus, chief investment officer of Goldman Sachs Asset Management Asia, finds regional stocks "more attractive than at any time since the 1993 bull run.

CNN: HE WINDOWS LEAK, PIECES FALL OFF THE FACADE.

He was my Negus and that's what I called him.

BBC: Negus McClean murder: Mother makes Facebook appeal

Dr Peter Hargreaves, a consultant in palliative medicine, Dr David Hill, fellow of the Faculty of Anaesthetists of the Royal College of Surgeons, Dr Elizabeth Negus, a lecturer at Barking University, and Dowager Lady Salisbury, chairman of Choose Life, were the other signatories.

BBC: 'Crisis' over terminally-ill care