The department, however, defended its ongoing probe saying that the investigation has entered the "fifth layer" and the approach towards the case has not been tardy.
बहरहाल, विभाग ने बचाव करते हुए कहा कि जांच ‘पांचवे दौर’ में पहुंच गई है और इसकी गति धीमी नहीं है।