Hamraaz

Hamraaz English Confidant is a 1967 Hindi musical and suspense thriller film produced and directed by B. R. Chopra. The film stars Sunil Dutt, Raaj Kumar, Mumtaz, Sarika, Madan Puri, Iftekhar, Balraj Sahni, Jeevan, Helen and Vimi. The films music is by Ravi, while the lyrics were penned by Sahir Ludhianvi.

Soon, Kumar notices that Meena does not accompany him to the stage any more, and excuses herself on the pretext of being ill. He finds clues that suggest that she is meeting somebody else on the sly. Suspicious, Kumar makes the excuse of going to Pune, and instead dons a beard and goes by the name of S.N. Sinha. He checks into a hotel, and writes his name in the hotel register. That night, he returns to his home, to find the door open, and before he can investigate anything, he hears a gunshot. Kumar runs into the room and finds Meena dead, shot in her chest.Enraged, he decides to call the police station, but realizes that he will be implicated in the murder his fingerprints are on the gun, he is in disguise, and he is next to the body. Kumar returns to the hotel instead, and smokes a lot of cigarettes. The case is assigned to Inspector Ashok Balraj Sahni, and the next day, when Kumar returns to Bombay, Ashok observes that Kumar knows which room the body is in, without being told by anyone. ........

Source: Wikipedia