Contract killers behind murder of IndiGo station manager, says DGP Details of the investigation cannot be shared now unless the police get their hands on concrete evidence, he added BusinessToday.In | January 17, 2021 | Updated 15:33 IST Bihar DGP SK Singhal has disclosed that contract killers were behind the murder of IndiGo station manager Rupesh Kumar Singh. Stating that the crime is "purely" a case of contract killing, DGP Singhal said, "This matter is very sensitive and complicated. The case is very difficult and the police are probing several angles. "The DGP assured that arrests in connection with the case will be made soon and the perpetrators will be brought to justice. Details of the investigation cannot be shared now unless the police get their hands on concrete evidence, he added.