I could almost rewrite the book.
As a recruit taught how to walk and to breathe.
Used from the academy, he was still in his recruit (cadet?) uniform, when he was drafted to help the police with a subway strike.
Fought a local tough with fists and told off by a fellow officer for not using his nightstick.
Became an investigator which seemed a rank below detective and not terribly respected
Took up smoking cigars when a detective on a stakeout.
etc.
Most irritating not to remember, wonder if the title was The Commissioner but may have watched too many Blue Bloods.