Marwahi (Chhattisgarh), July 3: In a significant breakthrough, the Madhya Pradesh Economic Offences Wing (EOW) has arrested coal trader Zafar Sheikh from his residence in Marwahi, Chhattisgarh, in connection with a staggering Rs 512 crore GST (Goods and Services Tax) fraud. The arrest is part of a larger investigation into bogus coal transactions and financial.