Chandigarh, Jan. 29 -- Testimonies of the then Himachal Pradesh director general of police (DGP) Somesh Goyal, additional superintendent of police (SP) Bhajan Dev Negi, two police constables, including night sentry (guard) and night munshi, who had witnessed custodial torture leading to death of a suspect Suraj at the Kotkhai police station on the intervening night of July 18 and 19, 2017, were instrumental in the conviction of eight police officials, including senior IPS officer Zahur Haider Zaidi, by the CBI court of special judge Alka Malik....