The Cold Dish by Craig Johnson

Not so different from John Hart, The Cold Dish is set in small town Wyoming - so small that the county sheriff's office has only 4 deputies.  When Cody Pritchard is found shot to death in the mountains, everyone thinks it must be a hunting accident.  However, Pritchard and three friends raped a Native American girl, were found guilty, but were given light sentences.  Just back from the juvenile detention center, the four boys are shunned in town.  Sheriff Walt Longmire finds his force stretched very thin over the large county as he tries to solve the murder before anyone else is killed.

Told from the Sheriff's point of view, the story unfolds slowly and takes some unexpected turns, but ultimately comes to a satisying ending.