A lot of crime ficition has been moved to the second row in the bookcase by now, but, besides Chandler and Hammett, Ross Thomas is still displayed with all his 25 novels in the front row... somewhere between thriller and crime I'd say... I also love Lawrence Block, especially but not only, the Bernie Rhodenbarr series and Charles Willeford... incidentally, Ethan Iverson has written loads of great posts about people like Thomas, Block and Willeford... (I discovered Thomas via Jörg Fauser and then the other two via Iverson)
for example, this is the Thomas post
https://ethaniverson.com/newgate-callendar/ah-treachery-ross-thomas/
I would assume Detroit was the historical connection between Joe Henderson and Danny Spencer. Of course, Joe's brother Leon was in Cox's Contemporary Jazz Quintet.
The one time I saw Dexter was at the Jazz Showcase, but Kirk Lightsey, David Eibankd, and Eddie Gladden. That would be fine too!
But as long as Eddie Gladden is there, all should be well.