First posted in Feb 1997, revived in July 2001, and dying away. I'm curious.

Here is an interview with the author I found on the web. I haven't read the books, but if I come across them I think I will.

There's nothing here that really relates to it. But I'd bet that the song is written in the 1990s rather than the 1920s. The stance feels like that a detective story writer might take - hidden guilt exposed, the least likely suspect, that kind of thing.