Dead Girl Moon — Charlie Price

As their hardscrabble lives intertwine in a small, corrupt Montana town, Grace, a scheming runaway, JJ, her fostercare sister, and Mick, the son of a petty thief, discover the body of a dead teenage prostitute. Afraid to come forward, the teens try to hide their knowledge of the crime, because they believe the murderer is one of the corrupt officials and businessmen who rule their town. But after a series of false moves and dumb mistakes, the teens are soon suspects themselves in a murder investigation threatening their freedom -- and maybe their lives.