Hyderabad, March 6 -- The crime investigation department (CID) of Andhra Pradesh police on Thursday questioned senior Indian Police Service (IPS) officer of Bihar cadre M Sunil Naik in connection with the alleged custodial assault case involving former Narasapuram MP and current assembly deputy speaker K Raghu Ramakrishnam Raju in May 2021, people familiar with the matter said.

Naik, currently serving as the inspector general, fire and homeguards services in Bihar, appeared at the central crime police station in Guntur, where a team of CID officials, led by Vizianagaram superintendent of police Damodar, who is the investigating officer in the case, grilled him for nearly seven hours, the police said.

The investigators sought explanation...