The Sleeping City

The Sleeping City is a 1950 film noir, shot in semidocumentary style set in and shot at New Yorks Bellevue Hospital. It was directed by George Sherman and features Richard Conte, Coleen Gray and Richard Taber.

An intern is shot mysteriously on an East River pier adjoining Bellevue Hospital. The chief investigating detective views this as a difficult case, so with the cooperation of the Commissioner of Hospitals he assigns a detective who had been a medical corpsman, Fred Rowan of the Confidential Squad, to go undercover as intern Fred Gilbert.Rowan becomes involved with the attractive nurse Ann Sebastian Coleen Gray, and also becomes friendly with the popular elevator operator, Pop Ware Richard Taber. ........

Source: Wikipedia