A MAN was battered into a coma and then, as he recovered, attacked with a knife in a bid to silence him. Gang-related mayhem on a Greenham housing estate last year had prompted police to impose a rare, emergency Section 60 order giving them enhanced powers to keep order. On Wednesday, May 15, two local teenagers, Jake Bozarth and Jake Blandford, were jailed for witness intimidation arising from a summer of violence. Brinder Soora, prosecuting, said victim Callum Brown had been attacked by a gang on The Nightingales estate in May and beaten into an eight day coma. He subsequently helped police …