It adds to the quality of the program to have background and transition music provided by an orchestra and not an organ. "Tony" was played by Frank Lovejoy who would have his own radio program, "Night Beat," in two years (1950). This was another high quality episode of "Box 13" with the capable Alan Ladd.
I really like the old time radio detective shows, but they all have one thing in common. The detectives are always being surprised by the bad guys. You would think after a dozen times they would be more aware.