New Delhi, Sept. 14 -- The Delhi Police crime branch on Saturday said it had cracked a highway theft in which four men posing as bank officials allegedly drugged a truck driver and stole about 6,000 kg of copper scrap worth roughly Rs.55 lakh near Signature Bridge in northeast Delhi's Khajoori Khas on Tuesday morning. Investigators later arrested four people-including the driver himself-for staging the heist to sell the copper on the grey market, and said the entire consignment had been recovered. The accused were identified as Arun Soni, a scrap dealer and alleged mastermind; Manish Kumar, the truck driver and key conspirator; Aditya Shah, a friend of Kumar; and Ramzan Ali, who administered the injection. According to deputy commissioner of police (crime) Harsh Indora, the gang plotted to sell the copper in the grey market for profit. Police registered a case under sections 123 and 303 of the Bharatiya Nyaya Sanhita at New Usmanpur police station, based on a complaint by driver Manish Kumar. He alleged that on Tuesday morning, while transporting 6,000 kilos of copper scrap from Libaspur in outer Delhi to Mandoli in the northeast, his truck was intercepted around 11am, as the vehicle crossed Signature Bridge and neared Khajoori Chowk, a Swift car blocked its path. The truck driver admitted to plotting the heist with his accomplices....