Source – indiatimes.com CHENNAI: Three months after a special court for CBI cases discharged former Union minister Dayanidhi Maran and his elder brother Kalanidhi Maran from the decade-old illegal telephone exchange case, the CBI has approached the Madras high court challenging it. Admitting the criminal revision petition, Justice G Jayachandran ordered notice to Maran brothers and seven others accused in the case returnable by June