From 1951. With Kirk Douglas. It's like a long version of a dramatic episode of "Barney Miller". And it doesn't get better than that.
The movie was adapted from a Broadway play and is entirely set in the detective bullpen area of a Manhattan police precinct. (a couple of scenes are set in the Lieutenant's office, the rear of a paddy wagon, the roof of the precinct station, and on the sidewalk in front of the precinct station.)
Lynda watched it with me and she wondered whether a Manhattan police station would have had a black uniformed officer in 1951. I think it would have -- the white detectives would have needed a black officer to do the booking fingerprints of any blacks that might have been arrested. In 1951 white cops didn't like touching blacks -- that darkiness might have rubbed off on them.
Almost everything about the movie rang true to me.