This is book 1 of the "Mac McRyan" series.

This note does not contain major spoilers for the book.

Prequel, Mack's first murder case. Self-published through Amazon. And I borrowed the ebook from the library; didn't think libraries bought self-published things from Amazon, but they appear to have (or...I think it's also on Smashwords, maybe they bought form Smashwords).

Nice set of twists and turns in their understanding of the case. No deep insights into the character.