Blackout — Campbell Armstrong

In international bestselling author Campbell Armstrong's razor-sharp thriller, one lapse in judgment turns a police detective into the prey of a shadowy, vicious killer

During a torrential rainstorm, Gregory Samsa crashes his car into a tree. While he escapes with only a few scrapes, the passenger sitting next to him, a prostitute named Almond, does not survive. Samsa is a cop, and he knows he should call an ambulance and report the accident -- but the truth is too ugly to reveal. He buries Almond in the woods and tries to get on with his life. But his life could be coming to an end sooner than he thinks.
 
When the young woman's body is found, Samsa is the cop who catches the case. A moment of moral weakness has condemned him to a spiral of deception and guilt, but it could mean far worse -- for there are dangerous men out there who want to know what happened that night in the rain.