Book 3 in the Micah Reed series of crime thrillers.
"Micah Reed has always been a sucker for a pretty face. When his shy neighbor Daisy shows up with a black eye, he's damn sure going to help her. He investigates her boyfriend, a man she last saw counting piles of unexplained cash. As Micah chases murky clues to uncover where all that money came from, he soon realizes the situation runs a lot deeper than a few illicit Benjamins."
This explains how Micah Reed meets and becomes friend with Layne Parrish.