Heavy case load ?
I love this film, however I can't help ignoring the elephant in the room. Even in 1948 the NYPD must've had more than 1 case to keep track of, murder cases even. It seems that this case took over the entire office full time, and 6 (or 7) cops trailing Frank Niles as a suspect.
It just seems to me that this is unrealistic. I could imagine the same thing happening today in NY City and nothing ever being done about it. I thought at first the girl must've been some kind of celebrity, but nope, just an average citizen.
Even in the short office scenes when some new evidence comes in, 5 detectives all in one room just sitting there pondering this one case, one smoking a pipe, this can't represent reality, even in 1948.
I guess there would be no story without the constant scrutinizing of this case, however it's hard to believe it would ever happen unless it were an extremely high profile case, even in 1948.