Custodial interrogation of 'encounter specialist' Sachin Vaze is necessary, a Thane court said on Saturday. The court was hearing Mumbai Police API Sachin Vaze's interim bail plea in the death of car dealer Mansukh Hiren. Family members of Mansukh Hiren said Sachin Vaze's role in his death must be probed. In its order rejecting Sachin Vaze's interim bail plea, the …