A £20,000 reward has been offered by police investigating the killing of a man shot in the head in what detectives believe was a case of mistaken identity.
Officers have yet to find a motive for the murder of 42-year-old Wayne Stockdale after he was shot while riding his bike by two masked men carrying handguns.
Mr Stockdale, from Poplar in east London, died four days after being shot in Rounton Road, Bow, east London, four years ago today.
Five people were arrested over the 2011 crime but were later released without charge.
Anyone with any information can contact police on 020 8785 8267.