The Narcotics Control Bureau (NCB), currently probing the drug angle in the Sushant Singh Rajput case, today filed a case in Delhi. The NCB has registered a case under Sections 20, 22, 27 and 29 of the NDPS (Narcotic Drugs and Psychotropic Substances) Act. The NCB has also booked Rhea Chakraborty, her brother Showik Chakraborty and others, against whom the ED had prepared a case.