A Darkened Room (A Zack Taylor Mystery)

While searching for a missing man, Zack Taylor stumbles across another body.
 
Though it looks like a suicide, Zack doesn't buy it, and he tampers with the crime scene to keep the police on the case. They do so, but are suspicious of Zack's involvement. More than his freedom is at stake when pieces of the dead man's activities become known, and the danger mounts for Zack and the woman who hired him.