Badlands by C.J. Box

Cassie Dewell has accepted a new job as the Chief Investigator for Bakken County in North Dakota. The area is in the middle of a population boom because of all the oil being drilled there. Along with an influx of commerce is an increase in crime, so Cassie will be busy. Cassie's boss, Jon Kirkbride, also believes that there is someone in the department who is working with the criminals, feeding them information. When a drug shipment and a large amount of money go missing after a car accident, there's an uptick of violence. Local teenager Kyle Westergaard unknowingly brings danger to his family when he finds something at the scene and brings it home. Will Cassie be able to keep Kyle safe and bring some justice to town?