Producer Madhu Mantena, who is also a stakeholder in Kwan talent management agency, reached the office of the Narcotics Control Bureau (NCB) this afternoon (23rd September) for interrogation. He was summoned by the NCB. Sushant Singh Rajput’s erstwhile manager, Jaya Saha, is already being questioned in the drugs case related to Sushant’s alleged suicide on 14th June. The NCB has hit upon a WhatsApp conversation between Mantena and Saha. It is probing the Bollywood-drugs mafia nexus.