CHENNAI: The Chengalpet taluk police opened fire on a history-sheeter when he tried to escape from their custody in the early hours of Thursday. The incident happened at Mamandur in Kancheepuram district.The history-sheeter, identified as P Thanikachalam, 36, of Mariyamman Koil Street in Tiruvallur district, suffered injuries on a knee and the right arm.Thanikachalam was an A-plus category rowdy at...