C.I.D. (1956)

A newspaper editor, Shrivastav, is killed when he was about to expose the underworld links of a very rich and influential person. C.I.D. Inspector Shekhar is assigned to this case, an investigation of which leads him to suspect Dharamdas and his men. But Dharamdas spins a web of lies and deceit, and Shekhar himself becomes a suspect, and is arrested by the police, and loses his job, leaving Dharamdas and his men to carry on undeterred.