The motion picture studio seen in the film is in fact the old RKO studio lot, now part of Paramount Pictures studio lot. Despite the film having been made more than seventy years ago, a lot of the buildings on the lot are virtually unchanged.
The tenth of sixteen movies for the suave detective nicknamed "The Falcon" released from 1941 to 1949.
One of two wartime murder/mysteries starring Tom Conway in which he is aided by a female taxicab driver (due to the "man"-power shortage of WWII). Coincidentally, Emory Parnell and Jean Brooks also appear in both films. The other is Two O'Clock Courage (1945).
This was RKO contract player Barbara Hale's second appearance in a Falcon film. She had previously appeared in the cowboy-themed Falcon Out West. Her best known performance would come more than a decade after this, when she was cast in her recurring, Emmy winning role as the title character's secretary Della Street in the original TV version of Perry Mason (1957).
This was one of the more successful entries in RKO's long running Falcon film series, turning a profit of more than $100,000.